mp-sp/AppStart/Tables/UserTradeData.cs

using System;
using System.Collections.Generic;
namespace MySystem
{
    public class UserTradeData
    {
        public decimal TotalAmt { get; set; }
        public decimal PosAmt { get; set; }
        public decimal QrAmt { get; set; }
        public List<Brand> Brands { get; set; }
    }

    public class Brand
    {
        public int Id { get; set; }
        public decimal Amt { get; set; }
    }
}