Move logic out the the class libs

PointOfSale/Pos.Models/AmountGridModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Pos.Models
+{
+    public class AmountGridModel
+    {
+        public string PaymentMethodText { get; set; } = string.Empty;
+        public decimal Amount { get; set; }
+        public string AmountText { get; set; } = string.Empty;
+    }
+}