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.
How Push-Ups Build More Muscle. Logic says the push-up won't build strength unless you're kind of weak to begin with. Its benefits lie elsewhere. If you do push-ups correctly, you develop your scapular muscles and your rotator-cuff muscles to stabilize your shoulders. If you do bench presses instead of push-ups, you don't have to use those muscles as much, says Michael Clark, C.S.C.S., a physical therapist and president of the National Academy of Sports Medicine.