diff --git a/BeautySalon/BeautySalon.sln b/BeautySalon/BeautySalon.sln
index d55dc1e..fa561a8 100644
--- a/BeautySalon/BeautySalon.sln
+++ b/BeautySalon/BeautySalon.sln
@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BeautySalonDataModels", "..
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BeautySalonContracts", "..\BeauySalonContracts\BeautySalonContracts.csproj", "{8CBBB8D6-5615-417B-82C5-B069EA84AB3C}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BeautySalonBusinessLogic", "..\BeautySalonBusinessLogic\BeautySalonBusinessLogic.csproj", "{EC867077-D21F-4D12-9BD5-16244A3D119C}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{8CBBB8D6-5615-417B-82C5-B069EA84AB3C}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8CBBB8D6-5615-417B-82C5-B069EA84AB3C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8CBBB8D6-5615-417B-82C5-B069EA84AB3C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EC867077-D21F-4D12-9BD5-16244A3D119C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EC867077-D21F-4D12-9BD5-16244A3D119C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EC867077-D21F-4D12-9BD5-16244A3D119C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EC867077-D21F-4D12-9BD5-16244A3D119C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/BeautySalonBusinessLogic/BeautySalonBusinessLogic.csproj b/BeautySalonBusinessLogic/BeautySalonBusinessLogic.csproj
new file mode 100644
index 0000000..6a2edb8
--- /dev/null
+++ b/BeautySalonBusinessLogic/BeautySalonBusinessLogic.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\BeauySalonContracts\BeautySalonContracts.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/BeautySalonBusinessLogic/BusinessLogics/ClientLogic.cs b/BeautySalonBusinessLogic/BusinessLogics/ClientLogic.cs
new file mode 100644
index 0000000..1a74081
--- /dev/null
+++ b/BeautySalonBusinessLogic/BusinessLogics/ClientLogic.cs
@@ -0,0 +1,111 @@
+using BeautySalonContracts.BindingModels;
+using BeautySalonContracts.BusinessLogicsContracts;
+using BeautySalonContracts.SearchModels;
+using BeautySalonContracts.StoragesContracts;
+using BeautySalonContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace BeautySalonBusinessLogic.BusinessLogics
+{
+    public class ClientLogic : IClientLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IClientStorage _clientStorage;
+
+        public ClientLogic(ILogger<ClientLogic> logger, IClientStorage clientStorage)
+        {
+            _logger = logger;
+            _clientStorage = clientStorage;
+        }
+
+        public bool Create(ClientBindingModel model)
+        {
+            CheckModel(model);
+            if (_clientStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ClientBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_clientStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ClientViewModel? ReadElement(ClientSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. PhoneNumber: {PhoneNumber} Id:{ Id}", model.PhoneNumber, model.Id);
+            var element = _clientStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<ClientViewModel>? ReadList(ClientSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. PhoneNumber: {PhoneNumber}. Id:{ Id}", model?.PhoneNumber, model?.Id);
+            var list = model == null ? _clientStorage.GetFullList() : _clientStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(ClientBindingModel model)
+        {
+            CheckModel(model);
+            if (_clientStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(ClientBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.ClientFIO))
+            {
+                throw new ArgumentNullException("Нет ФИО клиента", nameof(model.ClientFIO));
+            }
+            if (string.IsNullOrEmpty(model.PhoneNumber))
+            {
+                throw new ArgumentNullException("Нет номера телефона клиента", nameof(model.PhoneNumber));
+            }            
+            _logger.LogInformation("Client. ClientFIO:{ClientFIO}. PhoneNumber:{ PhoneNumber}. Id: { Id}", model.ClientFIO, model.PhoneNumber, model.Id);
+            var element = _clientStorage.GetElement(new ClientSearchModel { PhoneNumber = model.PhoneNumber });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Клиент с таким номером уже есть");
+            }
+        }
+    }
+}
diff --git a/BeautySalonBusinessLogic/BusinessLogics/MasterLogic.cs b/BeautySalonBusinessLogic/BusinessLogics/MasterLogic.cs
new file mode 100644
index 0000000..4396541
--- /dev/null
+++ b/BeautySalonBusinessLogic/BusinessLogics/MasterLogic.cs
@@ -0,0 +1,107 @@
+using BeautySalonContracts.BindingModels;
+using BeautySalonContracts.BusinessLogicsContracts;
+using BeautySalonContracts.SearchModels;
+using BeautySalonContracts.StoragesContracts;
+using BeautySalonContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace BeautySalonBusinessLogic.BusinessLogics
+{
+    public class MasterLogic : IMasterLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IMasterStorage _masterStorage;
+        public MasterLogic(ILogger<MasterLogic> logger, IMasterStorage masterStorage)
+        {
+            _logger = logger;
+            _masterStorage = masterStorage;
+        }
+        public List<MasterViewModel>? ReadList(MasterSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. MasterFIO:{MasterFIO}. Id:{ Id}", model?.MasterFIO, model?.Id);
+            var list = model == null ? _masterStorage.GetFullList() : _masterStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+        public MasterViewModel? ReadElement(MasterSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. MasterFIO:{MasterFIO}. Id:{ Id}", model.MasterFIO, model.Id);
+            var element = _masterStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+        public bool Create(MasterBindingModel model)
+        {
+            CheckModel(model);
+            if (_masterStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(MasterBindingModel model)
+        {
+            CheckModel(model);
+            if (_masterStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(MasterBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_masterStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(MasterBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.MasterFIO))
+            {
+                throw new ArgumentNullException("Нет ФИО мастера", nameof(model.MasterFIO));
+            }
+            if (string.IsNullOrEmpty(model.Specialization))
+            {
+                throw new ArgumentNullException("Нет специализации мастера", nameof(model.MasterFIO));
+            }
+            _logger.LogInformation("Master. MasterFIO:{MasterFIO}. Specialization:{ Specialization}. Id: { Id} ", model.MasterFIO, model.Specialization, model.Id);
+            var element = _masterStorage.GetElement(new MasterSearchModel
+            {
+                MasterFIO = model.MasterFIO
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Мастер с таким ФИО уже есть");
+            }
+        }
+    }
+}
diff --git a/BeautySalonBusinessLogic/BusinessLogics/ServiceLogic.cs b/BeautySalonBusinessLogic/BusinessLogics/ServiceLogic.cs
new file mode 100644
index 0000000..f6b2469
--- /dev/null
+++ b/BeautySalonBusinessLogic/BusinessLogics/ServiceLogic.cs
@@ -0,0 +1,107 @@
+using BeautySalonContracts.BindingModels;
+using BeautySalonContracts.BusinessLogicsContracts;
+using BeautySalonContracts.SearchModels;
+using BeautySalonContracts.StoragesContracts;
+using BeautySalonContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace BeautySalonBusinessLogic.BusinessLogics
+{
+    public class ServiceLogic : IServiceLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IServiceStorage _serviceStorage;
+        public ServiceLogic(ILogger<ServiceLogic> logger, IServiceStorage serviceStorage)
+        {
+            _logger = logger;
+            _serviceStorage = serviceStorage;
+        }
+        public List<ServiceViewModel>? ReadList(ServiceSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. ServiceName:{ServiceName}. Id:{ Id}", model?.ServiceName, model?.Id);
+            var list = model == null ? _serviceStorage.GetFullList() : _serviceStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+        public ServiceViewModel? ReadElement(ServiceSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. ServiceName:{ServiceName}. Id:{ Id}", model.ServiceName, model.Id);
+            var element = _serviceStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+        public bool Create(ServiceBindingModel model)
+        {
+            CheckModel(model);
+            if (_serviceStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(ServiceBindingModel model)
+        {
+            CheckModel(model);
+            if (_serviceStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(ServiceBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_serviceStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(ServiceBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.ServiceName))
+            {
+                throw new ArgumentNullException("Нет названия услуги", nameof(model.ServiceName));
+            }
+            if (model.Cost <= 0)
+            {
+                throw new ArgumentNullException("Цена услуги должна быть больше 0", nameof(model.Cost));
+            }
+            _logger.LogInformation("Service. ServiceName:{ServiceName}. Cost:{ Cost}. Id: { Id} ", model.ServiceName, model.Cost, model.Id);
+            var element = _serviceStorage.GetElement(new ServiceSearchModel
+            {
+                ServiceName = model.ServiceName
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Услуга с таким названием уже есть");
+            }
+        }
+    }
+}
diff --git a/BeautySalonBusinessLogic/BusinessLogics/VisitLogic.cs b/BeautySalonBusinessLogic/BusinessLogics/VisitLogic.cs
new file mode 100644
index 0000000..0f89116
--- /dev/null
+++ b/BeautySalonBusinessLogic/BusinessLogics/VisitLogic.cs
@@ -0,0 +1,95 @@
+using BeautySalonContracts.BindingModels;
+using BeautySalonContracts.BusinessLogicsContracts;
+using BeautySalonContracts.SearchModels;
+using BeautySalonContracts.StoragesContracts;
+using BeautySalonContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace BeautySalonBusinessLogic.BusinessLogics
+{
+    public class VisitLogic : IVisitLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IVisitStorage _visitStorage;
+        public VisitLogic(ILogger<VisitLogic> logger, IVisitStorage visitStorage)
+        {
+            _logger = logger;
+            _visitStorage = visitStorage;
+        }
+        public List<VisitViewModel>? ReadList(VisitSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. VisitId:{VisitId}.", model?.Id);
+            var list = model == null ? _visitStorage.GetFullList() : _visitStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+        public VisitViewModel? ReadElement(VisitSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
+            var element = _visitStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+        public bool Create(VisitBindingModel model)
+        {
+            CheckModel(model);
+            if (_visitStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(VisitBindingModel model)
+        {
+            CheckModel(model);
+            if (_visitStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(VisitBindingModel model)
+        {
+            CheckModel(model);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_visitStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private bool CheckModel(VisitBindingModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (model.Count <= 0)
+            {
+                throw new ArgumentNullException("Количество услуг должно быть больше 0", nameof(model.Count));
+            }
+            if (model.Sum <= 0)
+            {
+                throw new ArgumentNullException("Суммарная стоимость должна быть больше 0", nameof(model.Sum));
+            }
+            return true;
+        }
+    }
+}
diff --git a/BeautySalonDataModels/Models/IVisitModel.cs b/BeautySalonDataModels/Models/IVisitModel.cs
index 22e53c6..4a3e2db 100644
--- a/BeautySalonDataModels/Models/IVisitModel.cs
+++ b/BeautySalonDataModels/Models/IVisitModel.cs
@@ -6,5 +6,7 @@
         int ClientId { get; }
         int MasterId { get; }
         int ServiceId { get; }
+        double Sum { get; }
+        int Count { get; }
     }
 }
diff --git a/BeauySalonContracts/BindingModels/VisitBindingModel.cs b/BeauySalonContracts/BindingModels/VisitBindingModel.cs
index 6182015..1020a65 100644
--- a/BeauySalonContracts/BindingModels/VisitBindingModel.cs
+++ b/BeauySalonContracts/BindingModels/VisitBindingModel.cs
@@ -9,5 +9,7 @@ namespace BeautySalonContracts.BindingModels
         public int ClientId { get; set; }
         public int MasterId { get; set; }
         public int ServiceId { get; set; }
+        public double Sum { get; set; }
+        public int Count { get; set; }
     }
 }
diff --git a/BeauySalonContracts/ViewModels/VisitViewModel.cs b/BeauySalonContracts/ViewModels/VisitViewModel.cs
index ea77b51..cab63b9 100644
--- a/BeauySalonContracts/ViewModels/VisitViewModel.cs
+++ b/BeauySalonContracts/ViewModels/VisitViewModel.cs
@@ -1,13 +1,19 @@
 using BeautySalonDataModels.Models;
+using System.ComponentModel;
 
 namespace BeautySalonContracts.ViewModels
 {
     public class VisitViewModel : IVisitModel
     {
         public int Id { get; set; }
+        [DisplayName("Дата посещения")]
         public DateTime DateOfVisit { get; set; }
         public int ClientId { get; set; }
         public int MasterId { get; set; }
         public int ServiceId { get; set; }
+        [DisplayName("Сумма")]
+        public double Sum { get; set; }
+        [DisplayName("Количество")]
+        public int Count { get; set; }
     }
 }