just looking for ladder logic for this..

Design a simple cash register similar to one found at McDonald's or Burger King. To do this, determine a menu of five or six items from the restaurant. Also, include a Total button or a clear button or possibly both. Also, include a means for backing out of a mistake without starting over from zero. Display the cost of the total order in the PLC at an address in the data table. Use integer math only (not floating point). For example: Whopper Combo Cancel Last Whopper Whopper Dbl Combo New Order Fries Whopper Jr Combo Total/Tax/Op tional Drink Find the approximate prices from a McDonald's or Burger King for the items you choose. When an item is entered, its count is incremented automatically by one. If a button is entered multiple times, the count is incremented to display the total count. If a mistake is made, the attendant must be able to back up at least one entry and erase the last item or decrement that item by one. Display the final total in the PLC (not on the display of the trainer) Design a simple cash register similar to one found at McDonald's or Burger King. To do this, determine a menu of five or six items from the restaurant. Also, include a Total button or a clear button or possibly both. Also, include a means for backing out of a mistake without starting over from zero. Display the cost of the total order in the PLC at an address in the data table. Use integer math only (not floating point). For example: Whopper Combo Cancel Last Whopper Whopper Dbl Combo New Order Fries Whopper Jr Combo Total/Tax/Op tional Drink Find the approximate prices from a McDonald's or Burger King for the items you choose. When an item is entered, its count is incremented automatically by one. If a button is entered multiple times, the count is incremented to display the total count. If a mistake is made, the attendant must be able to back up at least one entry and erase the last item or decrement that item by one. Display the final total in the PLC (not on the display of the trainer)