Use the provided C# (C-Sharp) program and make the required adjustments.

Based on Receipt Version 3 (provided on the bottom), add input validation with regular expression.

1. Item name filed. -- Allow multiple words to be entered -- Uppercase/lowercase letters allowded -- 0 to 9 allowed -- White space, (), &, _, -, ., + allowed

2. Quantity field. -- 0 to 9 allowed

3. Price field. -- 0 to 9 allowed

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;

namespace Receipt3.cs { class Program { static void Main(string[] args) { int count = 0; string[,] items = new string[100, 4]; bool repeat = true; string name; decimal price, subtotal = 0.0M, tax, total; int quantity;

Console.Write("\t\t\tScan Items Now");

do { for (int i = 0; i

Console.Write(" Item Name (enter 0 to stop):\t"); name = Console.ReadLine();

if (name.Trim() == "0") { repeat = false; break; } else { Console.Write(" Item Price:\t\t\t$"); price = Convert.ToDecimal(Console.ReadLine().Replace('$', ' ').Trim());

Console.Write(" Quantity:\t\t\t"); quantity = Convert.ToInt32(Console.ReadLine());

subtotal = price * quantity;

items[i, 0] = name; items[i, 1] = price.ToString(); items[i, 2] = quantity.ToString(); items[i, 3] = subtotal.ToString(); count++; } } } while (repeat);

subtotal = 0.0M; for (int i = 0; i

tax = subtotal * Convert.ToDecimal(0.065); total = subtotal + tax;

for (int i = 0; i

Console.WriteLine(" \t\t\tYour Receipt "); Console.WriteLine("Item\t\tPrice\t Quantity\t Subtotal "); for (int i = 0; i

Console.WriteLine(" ---------------------------------------------------"); Console.WriteLine( " "+ count + " Items."); Console.WriteLine(" Subtotal:\t\t$" + subtotal.ToString("0.00")); Console.WriteLine(" Tax(0.065%):\t\t$" + tax.ToString("0.00")); Console.WriteLine(" Total:\t\t\t$" + total.ToString("0.00")); Console.WriteLine(" Press any key to exit..."); Console.ReadKey(); } } }

The output should looke like this:

Please compile to verify output.

Scan Items Now Item Name (enter 0 to stop) sadfsd dsaf Enter Quantity: 3 Enter Price 33.33 Item Name (enter 0 to stop) asdf001 Enter Quantity: 2 Enter Price 3.3 Item Name (enter 0 to stop) asf sadf-11 Enter Quantity: 1 Enter Price: 3 Item Name enter 0 to stop)