20. Costs that have both variable and fixed components are called A) fixed costs B) variable costs mixed costs D) contribution costs 21. Pluto Hand Blenders Company sold 3,000 units in October at a sales price of $45 per unit. The variable cost is $25 per unit. Calculate the total contribution margin. A) $135,000 B) $60,000 $75,000 D) $37,500