Shawn gets an allowance of $5 every other Sunday for doing chores. He likes to stop on his way home from school and buy a healthy snack. His favorite treat costs $0.65. How many of these snacks can Shawn afford every two weeks? After buying as many of these snacks with his $5 as possible, Shawn puts his left-over allowance in his piggy bank. He is saving to buy a new calculator. The model he wants costs $8.95. (It performs integer division and operations with fractions!) How many weeks will it take Shawn to save enough for the calculator?