diff --git a/SushiBar.sln b/SushiBar.sln
index ce801dd..acbfe61 100644
--- a/SushiBar.sln
+++ b/SushiBar.sln
@@ -9,7 +9,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SushiBarDataModels", "Sushi
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SushiBarDatabaseImplement", "SushiBarDatabaseImplement\SushiBarDatabaseImplement.csproj", "{135C846B-59EC-4803-B07C-8991C60C57D6}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SushiBarContracts", "SushiBarContracts\SushiBarContracts.csproj", "{25C0DCD8-6A40-42C5-8459-00F6F085A8C6}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SushiBarContracts", "SushiBarContracts\SushiBarContracts.csproj", "{25C0DCD8-6A40-42C5-8459-00F6F085A8C6}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SushiBarBusinessLogic", "SushiBarBusinessLogic\SushiBarBusinessLogic.csproj", "{9C95CAA4-50E8-42DC-B73E-0DB60EDC7A8A}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -33,6 +35,10 @@ Global
 		{25C0DCD8-6A40-42C5-8459-00F6F085A8C6}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{25C0DCD8-6A40-42C5-8459-00F6F085A8C6}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{25C0DCD8-6A40-42C5-8459-00F6F085A8C6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9C95CAA4-50E8-42DC-B73E-0DB60EDC7A8A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9C95CAA4-50E8-42DC-B73E-0DB60EDC7A8A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9C95CAA4-50E8-42DC-B73E-0DB60EDC7A8A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9C95CAA4-50E8-42DC-B73E-0DB60EDC7A8A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/SushiBarBusinessLogic/ChequeLogic.cs b/SushiBarBusinessLogic/ChequeLogic.cs
new file mode 100644
index 0000000..2697dea
--- /dev/null
+++ b/SushiBarBusinessLogic/ChequeLogic.cs
@@ -0,0 +1,51 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class ChequeLogic
+    {
+        private readonly ChequeStorage _chequeStorage;
+
+        public ChequeLogic(ChequeStorage ChequeStorage)
+        {
+            _chequeStorage = ChequeStorage;
+        }
+
+        public List<ChequeViewModel>? ReadList(ChequeSearchModel? Model)
+        {
+            var List = Model is null ? _chequeStorage.GetFullList() : _chequeStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public ChequeViewModel? ReadElement(ChequeSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _chequeStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool CreateCheque(ChequeBindingModel Model)
+        {
+            if (_chequeStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/CookLogic.cs b/SushiBarBusinessLogic/CookLogic.cs
new file mode 100644
index 0000000..1737b48
--- /dev/null
+++ b/SushiBarBusinessLogic/CookLogic.cs
@@ -0,0 +1,69 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class CookLogic
+    {
+        private readonly CookStorage _cookStorage;
+
+        public CookLogic(CookStorage CookStorage)
+        {
+            _cookStorage = CookStorage;
+        }
+
+        public List<CookViewModel>? ReadList(CookSearchModel? Model)
+        {
+            var List = Model is null ? _cookStorage.GetFullList() : _cookStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public CookViewModel? ReadElement(CookSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _cookStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool Create(CookBindingModel Model)
+        {
+            if (_cookStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(CookBindingModel Model)
+        {
+            if (_cookStorage.Update(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(CookBindingModel Model)
+        {
+            if (_cookStorage.Delete(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/CustomerLogic.cs b/SushiBarBusinessLogic/CustomerLogic.cs
new file mode 100644
index 0000000..87678d4
--- /dev/null
+++ b/SushiBarBusinessLogic/CustomerLogic.cs
@@ -0,0 +1,69 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class CustomerLogic
+    {
+        private readonly CustomerStorage _customerStorage;
+
+        public CustomerLogic(CustomerStorage CustomerStorage)
+        {
+            _customerStorage = CustomerStorage;
+        }
+
+        public List<CustomerViewModel>? ReadList(CustomerSearchModel? Model)
+        {
+            var List = Model is null ? _customerStorage.GetFullList() : _customerStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public CustomerViewModel? ReadElement(CustomerSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _customerStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool Create(CustomerBindingModel Model)
+        {
+            if (_customerStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(CustomerBindingModel Model)
+        {
+            if (_customerStorage.Update(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(CustomerBindingModel Model)
+        {
+            if (_customerStorage.Delete(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/DishLogic.cs b/SushiBarBusinessLogic/DishLogic.cs
new file mode 100644
index 0000000..b0c0268
--- /dev/null
+++ b/SushiBarBusinessLogic/DishLogic.cs
@@ -0,0 +1,69 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class DishLogic
+    {
+        private readonly DishStorage _dishStorage;
+
+        public DishLogic(DishStorage DishStorage)
+        {
+            _dishStorage = DishStorage;
+        }
+
+        public List<DishViewModel>? ReadList(DishSearchModel? Model)
+        {
+            var List = Model is null ? _dishStorage.GetFullList() : _dishStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public DishViewModel? ReadElement(DishSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _dishStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool Create(DishBindingModel Model)
+        {
+            if (_dishStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(DishBindingModel Model)
+        {
+            if (_dishStorage.Update(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(DishBindingModel Model)
+        {
+            if (_dishStorage.Delete(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/IngredientLogic.cs b/SushiBarBusinessLogic/IngredientLogic.cs
new file mode 100644
index 0000000..6beae1f
--- /dev/null
+++ b/SushiBarBusinessLogic/IngredientLogic.cs
@@ -0,0 +1,69 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class IngredientLogic
+    {
+        private readonly IngredientStorage _ingredientStorage;
+
+        public IngredientLogic(IngredientStorage IngredientStorage)
+        {
+            _ingredientStorage = IngredientStorage;
+        }
+
+        public List<IngredientViewModel>? ReadList(IngredientSearchModel? Model)
+        {
+            var List = Model is null ? _ingredientStorage.GetFullList() : _ingredientStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public IngredientViewModel? ReadElement(IngredientSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _ingredientStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool Create(IngredientBindingModel Model)
+        {
+            if (_ingredientStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(IngredientBindingModel Model)
+        {
+            if (_ingredientStorage.Update(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(IngredientBindingModel Model)
+        {
+            if (_ingredientStorage.Delete(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/PromotionLogic.cs b/SushiBarBusinessLogic/PromotionLogic.cs
new file mode 100644
index 0000000..b35b34a
--- /dev/null
+++ b/SushiBarBusinessLogic/PromotionLogic.cs
@@ -0,0 +1,69 @@
+using SushiBarContracts.BindingModels;
+using SushiBarContracts.SearchModels;
+using SushiBarContracts.ViewModels;
+using SushiBarDatabaseImplement.Storages;
+
+namespace SushiBarBusinessLogic
+{
+    public class PromotionLogic
+    {
+        private readonly PromotionStorage _promotionStorage;
+
+        public PromotionLogic(PromotionStorage PromotionStorage)
+        {
+            _promotionStorage = PromotionStorage;
+        }
+
+        public List<PromotionViewModel>? ReadList(PromotionSearchModel? Model)
+        {
+            var List = Model is null ? _promotionStorage.GetFullList() : _promotionStorage.GetFilteredList(Model);
+
+            if (List is null)
+            {
+                return null;
+            }
+            return List;
+        }
+
+        public PromotionViewModel? ReadElement(PromotionSearchModel? Model)
+        {
+            if (Model is null)
+                throw new ArgumentNullException(nameof(Model));
+
+            var Element = _promotionStorage.GetElement(Model);
+
+            if (Element is null)
+            {
+                return null;
+            }
+            return Element;
+        }
+
+        public bool Create(PromotionBindingModel Model)
+        {
+            if (_promotionStorage.Insert(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(PromotionBindingModel Model)
+        {
+            if (_promotionStorage.Update(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(PromotionBindingModel Model)
+        {
+            if (_promotionStorage.Delete(Model) is null)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/SushiBarBusinessLogic/SushiBarBusinessLogic.csproj b/SushiBarBusinessLogic/SushiBarBusinessLogic.csproj
new file mode 100644
index 0000000..8f29bb8
--- /dev/null
+++ b/SushiBarBusinessLogic/SushiBarBusinessLogic.csproj
@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SushiBarDatabaseImplement\SushiBarDatabaseImplement.csproj" />
+  </ItemGroup>
+
+</Project>