CASH PAYMENTS TO HAVE CALCULATOR BOX POP UP WHEN INSERTING CASH PAYMENTS.

For Cash Payment option, can we have the calculator come up, where we put in tendered amount and it tells us how much change to give. It did this on old Room master, when we inserted cash as form of payment, the foreign currency calculator used to come up and that's where we inserted the tendered amount and it told us how much change to give?