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John is shopping at pizza Hot. He is ordering two large sausage pizzas, one large cheese pizza, drinks, and wings for his birthday party.

He saves the unit prices and orders in a file named 'orders.txt$\text{'}.$ The contents of the file are as follows: The sausage pizza costs $$11\mathrm{.}99$ with $2$ orders, a cheese pizza costs $$9\mathrm{.}99$ with one order, drinks are priced at $$2\mathrm{.}55$ with $10$ orders, and wings cost $$6\mathrm{.}50$ with $3$ orders.

$11\mathrm{.}99,2,9\mathrm{.}99,1,2\mathrm{.}55,10,6\mathrm{.}50,3$

John pays $$100$ to the cashier and seeks your assistance in writing a C$++$ program to read the unit prices for pizza, coke, hotdog, and the corresponding orders from his file. With a sales tax of $2\%,$ your program will calculate the total amount he needs to pay and the change he will receive.

The receipt will be generated and saved to a file named 'receipt.txt$\text{'}.$ The output will display the total price of each item, the overall total, and the change, all rounded to two decimal places.

receipt.txt file: