public void GetTax()
{
Engine engine = new Engine();
ResultModel = engine.TaxCalculator(Model);
OnPropertyChanged("ResultModel");
OnPropertyChanged("Model");
}
/// <summary>
/// คำนวนภาษี
/// </summary>
/// <param name="inputCommand"></param>
/// <returns>ภาษีที่ต้องจ่ายแยกตามข้อ ก 1 - 12</returns>
public TaxResultModel TaxCalculator(TaxCalculatorCommand inputCommand)
{
TaxCalculatorCommand command = inputCommand;
TaxResultModel result = new TaxResultModel();
result.A1 = command.TotalIncome;
result.A2 = GetExemption(command);
result.A3 = result.A1 - result.A2;
result.A4 = GetPersonalExpenseExemption(command.TotalIncome);
result.A5 = result.A3 - result.A4;
result.A6 = GetAllowance(command);
result.A7 = result.A5 - result.A6;
result.A8 = EducationDonation(command.EducationDonation, result.A7);
result.A9 = result.A7 - result.A8;
result.A10 = OtherDonation(command.OtherDonation, result.A9);
result.A11 = result.A9 - result.A10;
result.A12 = StairCaseTax(result.A11);
return(result);
}
