using System;

public class Program

{

    public static void Main()

    {

        double price = 0.0 , total = 0.0;

        int number = 0;

        char input = ' ';

        do 

        {   

        Console.Write("Input price per unit : ");

        price =double.Parse(Console.ReadLine());

        Console.Write("Input number of unit : ");

        number =int.Parse(Console.ReadLine());

        double sum = price*number;

        total +=sum;

        Console.WriteLine("\nTotal price is {0:N} baht.", sum);

        Console.WriteLine("----------------------------------------------------------");

        Console.Write("Do you have other products? : ");

        input = char.Parse(Console.ReadLine());

        Console.WriteLine("----------------------------------------------------------");

        } while (input == 'y' || input == 'Y');

        Console.WriteLine("\nTotal price of all producte is {0:N} baht", total);

    }

}