Below are expenses for a company for the past 2 years

Year1 Year2 Classification

Units sold 10,000 14,000

Shipping expense $ 15,000 $ 21,000

Maintenance expense. $ 20,000 $ 24,000

Advertising expense $ 32,000 $ 32,000

Utility expense. $ 34,500 $ 39,500

Classify each of these cost items as Variable, Fixed, or Mixed by its cost behavior with respect to units sold. Type a V,F, or M in the answer boxes.