using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Welcome to Montana Co.");

        restart:

        Console.WriteLine("How many blazers would you like to purchase?");

        byte item1 = byte.Parse(Console.ReadLine());

        decimal cost1 = 19.99M * item1;

        Console.Clear();

        Console.WriteLine("How many business suits would you like to purchase?");

        byte item2 = byte.Parse(Console.ReadLine());

        decimal cost2 = 39.99M * item2;

        Console.Clear();

        Console.WriteLine("How many casual suits would you like to purchase?");

        byte item3 = byte.Parse(Console.ReadLine());

        decimal cost3 = 49.99M * item3;

        Console.Clear();

        Console.WriteLine("How many pea coats would you like to purchase?");

        byte item4 = byte.Parse(Console.ReadLine());

        decimal cost4 = 29.99M * item4;

        Console.Clear();

        decimal subtotal = cost1 + cost2 + cost3 + cost4;

        decimal shipping;

        if (subtotal <= 0)

        {

            shipping = 0M;

            Console.WriteLine("Please restart your order.");

            goto restart;

        }

        else if (subtotal > 0 && subtotal <= 50)

        {

            shipping = 7.99M;

            Console.WriteLine("Your shipping cost is 7.99.");

        }

        else if (subtotal > 50 && subtotal <= 100)

        {

            shipping = 9.99M;

            Console.WriteLine("Your shipping cost is 9.99.");

        }

        else

            Console.WriteLine("You qualify for free shipping.");

            shipping = 0M;

            decimal tax = 0.8625M * subtotal;

            decimal grandtotal = subtotal + tax + shipping;

            Console.WriteLine("Your subtotal is " + subtotal.ToString("C"));

            Console.WriteLine("Your grandtotal is " + grandtotal.ToString("C"));

        }

    }