1. You have $20 to spend at the snack bar. Each snack at the snack bar costs $1.25. How much money will you have left if you buy s snacks?

2. Ty works at an electronics store. He earns $5 per hour and 6% commission on all his sales. If Ty works 12 hours and makes s dollars in sales, how much does he make for the day?

3. A shirt is on sale for 25% off. If c is the initial cost of the shirt, how much will the sale price be?