Move logic out the the class libs

PointOfSale/Pos.Models/TotalSaleCategory.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 TotalSaleCategory
+    {
+        public string Category { get; set; } = string.Empty;
+        public decimal Sale { get; set; }
+        public string SaleString { get; set; } = string.Empty;
+    }
+}