вот теперь точно заработало (наверн)

Confectionery/ConfectioneryClientApp/Views/Home/Create.cshtml

@@ -8,28 +8,23 @@
 	<div class="row">
 		<div class="col-4">Изделие:</div>
 		<div class="col-8">
-			<select id="pastry" name="pastry" class="form-control" aspitems="@(new SelectList(@ViewBag.Pastrys,"Id", "ProductName"))"></select>
+			<select id="pastry" name="pastry" class="form-control" asp-items="@(new SelectList(@ViewBag.Pastrys,"Id", "PastryName"))"></select>
 		</div>
 	</div>
 	<div class="row">
 		<div class="col-4">Количество:</div>
-		<div class="col-8">
+		<div class="col-8"><input type="text" name="count" id="count" /></div>
-			<input type="text" name="count" id="count" />
-		</div>
 	</div>
 	<div class="row">
 		<div class="col-4">Сумма:</div>
-		<div class="col-8">
+		<div class="col-8"><input type="text" id="sum" name="sum" readonly /></div>
-			<input type="text" id="sum" name="sum" readonly />
-		</div>
 	</div>
 	<div class="row">
 		<div class="col-8"></div>
-		<div class="col-4">
+		<div class="col-4"><input type="submit" value="Создать" class="btn btn-primary" /></div>
-			<input type="submit" value="Создать" class="btn btn-primary" />
-		</div>
 	</div>
 </form>
+
 <script>
 	$('#pastry').on('change', function () {
 		check();
@@ -37,10 +32,11 @@
 	$('#count').on('change', function () {
 		check();
 	});
+
 	function check() {
 		var count = $('#count').val();
 		var pastry = $('#pastry').val();
-		if (count && product) {
+		if (count && pastry) {
 			$.ajax({
 				method: "POST",
 				url: "/Home/Calc",
@@ -51,4 +47,4 @@
 			});
 		};
 	}
-</script>
+</script>