I need help with a assembly language programing assignment for school. The assignment goes as follows: There are 4 items at 4 different prices a customer can buy. Each customer is limited to 99 items and the ammount will never exceed $655.35. The program needs to prompt the user for how many of each item they want. Then display the subtotal and the amount of sales tax (6%). and the total cost of food plus tax with all the digits neatly displayed, the decimal points all need to be lined up. If user enters 0 for all items the program will generate a message indicating that there was no sale. IF total exceeds $655.35 a error message appears. The program then prompts the user if they want to proceed with another order. the user will respond with "Y" or "N". If "Y" or "y" then continue or else quit.

I really have no Idea where to start on this. Can someone please point me in the right dirrection.