You need to purchase some items at Hansen's Discount Supermarket. You have a list of items but you know that when you get to the store you will most likely purchase other things. After you have selected your products at the store, you get up to the self$-$checkout and the scanner is broken. The manager approaches you because he knows that you are a knowledgeable programmer to help him design a small program quickly that will manually total items purchased and calculate the tax and final total of all sales. See below for the specific specifications.