How do you input into this calculator?
when you press the button, say its to buy the gun, the price goes to a board with 2 rows of numbers, the top number is your current money, the bottom number is the price of what you want to buy and there is a button, that when pressed, will subtract the bottom number from the top number and update your current amount of money.
it sounds complicated i know but i really need this to make it work.