12. Variable cost per unit remains fixed. True False 13. Cost volume profit analysis assumes that sales volume does not change. True False 14. Profit is the difference between sales and contribution. True False 15. At break-even point, fixed cost is equal to contribution. True False 16. When standard cost is more than actual cost, it is called a Favorable variance. True False 17. Cost unit and cost center have same meaning. True False 18. Standard costing is technique of profit planning. True False 19. The most important purpose of standard costing is to control costs. True False 20. Material price variance arises due to reasons like inefficient purchase and change in market price. True False