What 3 concepts are covered in the Tip Calculator?
the amount due for products or services rendered including current charges and previous unpaid balance, plus or minus any adjustments.
a specified amount in or for every hundred. one part in every hundred. n% = n/100
a sum of money gratuitously and voluntarily left by a customer for service, or indicated on a bill or charge statement, to be paid to a service or tipped employee for directly and personally serving the customer in a hotel, motel, tourist place, or restaurant.