using System;

public class Program

{

     static void Main(string[] args)

        {

            Console.WriteLine("Hello World!");

​

            Calculator obj = new Calculator();

            int[] input1 = { 1, 2, 3, 4, 5 };

            float result = obj.Add(input1);

            Console.WriteLine(result);

​

            Calculator obj1 = new TaxInclusion();

            float result1 = obj1.Add(input1);

            Console.WriteLine(result1);

​

            Calculator obj2 = new TaxDeduction();

            float result2 = obj2.Add(input1);

            Console.WriteLine(result2);

​

            //Payment obj3 = new Payment();

            //int  result3 = obj3.OriginalAdd(input1);

            //Console.WriteLine(result3);

​

            Console.ReadLine();

     }

    public class Calculator

    {

       public float bill; 

        public virtual float Add(int[] Number)

        {

            for(int i =0; i< Number.Length; i++)

            {

                bill += Number[i];

            }

            return bill;

        }

    }

    public class TaxDeduction : Calculator

    {

        float DeductedBill;

        float deduction;

        public override float Add(int[] Number)

        {

            for (int i = 0; i < Number.Length; i++)

            {

                bill += Number[i];

            }

​

            deduction = bill / 5;

            DeductedBill = bill - deduction;

            return DeductedBill;

        }

    }

    public class TaxInclusion :Calculator

    {

        float IncludedBill;

        float inclusion;

        public override float Add(int[] Number)

        {

            for (int i = 0; i < Number.Length; i++)

            {

                bill += Number[i];

            }

            inclusion = bill/10;

            IncludedBill = bill + inclusion;

            return IncludedBill;

        }

    }

    public class Payment

    {

        public void OriginalAdd(int[] input)

        {

            var Calculator = new Calculator();

        }

​

        public void Include(int[] input)

        {

            var Calculator = new TaxInclusion();

        }

​

        public void Deduct(int[] input)

        {

            var Calculator = new TaxDeduction();

        }

    }

}