Ethan bought a printer on sale for $59.99 and a jump drive for $6.99. the sales tax on the total was $5.36. Ethan gave the sales person four $20 bills. how much change did Ethan receive?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)