Question 10 1 pts Variable costs (on a per-unit basis) remain constant in proportion to changes in volume. True O False Question 13 1 pts Fixed costs, on a per-unit basis, have a directly proportional relationship with changes in sales or production. (In other words, Fixed Cost per unit do not change when the level of sales/production changes.) O True False 1 pts D Question 15 One of the assumptions for cost-volume-profit analysis is that the variable costs per unit remains unchanged for all units sold during the planning period. True False Question 16 1 pts A cost that changes in proportion to changes in volume of activity, but remains the same per unit is a: Differential cost Fixed cost. Incremental cost Variable cost Product cost