This document provides instructions on calculating markups and discounts. It defines markup as the amount of increase over the store's cost, and discount as the amount of decrease from the regular price. It gives examples of finding the markup on items when given the store's cost and percent of markup. Similarly, it provides examples of finding the discount and sale price on items originally priced at a regular price when given the percent discounted. The goal is to practice calculating markups, discounts, selling prices, and sale prices.