7. Keyshawn's brother works in a shoe store. A. Keyshawn's brother earns a commission. He makes 3.5% of the amount he sells. Last week, he sold $800 worth of shoes. How much was his commission?

B. The store bought a pair of shoes for $60, and sold it for $90. What percentage was the markup?

C. Keyshawn's brother earns $15 per hour. The store offers him a raise-- a %6 increase per hour. After the raise, how much will Keyshawn's brother make per hour?