At the point of sale, the merchant would calculate the amount owed by the customer and indicate the amount, and may prepare an invoice for the customer (which may be a cash register printout), and indicate the options for the customer to make payment.
Performing push-ups works a variety of muscles in your upper body, including specific muscles within your abdomen, chest, shoulders and upper arms. You can vary your technique by placing your hands at different widths to emphasize one area over another.
What Muscles Do Pull-Ups and Chin-Ups Work. 1  During a Pull-Up the muscles that are mainly worked are those of the upper body and the arms. 2  It is one the largest muscles found on your body, on the lateral sides of the back. It is responsible for supplying much of the force needed to execute a Pull-up.