using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        decimal percentageAsDecimal  = 0.10m;

        decimal qty  = 654.654654m;

        decimal unitBasePrice = 35.000000m;

        decimal unitBasePriceDisc = 31.5000m;

​

        decimal discountAmount = unitBasePrice * qty - (unitBasePrice * percentageAsDecimal);

        decimal taxConceptUnit = unitBasePriceDisc * 0.16m ;

        decimal taxConcept = Math.Round(unitBasePriceDisc * 0.16m * qty, 2, MidpointRounding.AwayFromZero);

        decimal subtotalConcept = Math.Round(unitBasePrice * qty, 2, MidpointRounding.AwayFromZero);

        decimal totalConcept = subtotalConcept + taxConcept;    

        decimal totalUnitPrice = unitBasePriceDisc * 1.16m ;

        Console.Write("discountAmount: ");

        Console.WriteLine(Math.Round(discountAmount, 6, MidpointRounding.AwayFromZero));

        Console.Write("taxConceptUnit: ");

        Console.WriteLine(Math.Round(taxConceptUnit, 6, MidpointRounding.AwayFromZero));

        Console.Write("totalUnitPrice: ");

        Console.WriteLine(Math.Round(totalUnitPrice, 6, MidpointRounding.AwayFromZero));

        Console.Write("taxConcept: ");

        Console.WriteLine(Math.Round(taxConcept, 6, MidpointRounding.AwayFromZero));

        Console.Write("subtotalConcept: ");

        Console.WriteLine(Math.Round(subtotalConcept, 6, MidpointRounding.AwayFromZero));

        Console.Write("tax: ");

        Console.WriteLine(Math.Round(taxConcept, 2, MidpointRounding.AwayFromZero));

        Console.Write("subtotal: ");

        Console.WriteLine(Math.Round(subtotalConcept, 2, MidpointRounding.AwayFromZero));

        Console.Write("total: ");

        Console.WriteLine(Math.Round(taxConcept+subtotalConcept, 2, MidpointRounding.AwayFromZero));

​

    }

}