1. Variable costs are costs that remain constant on a per unit basis as the volume of manufacturing activity changes.
   1. True
   2. False
2. Variable costs are costs that vary in total in direct proportion to changes in an activity base.
   1. True
   2. False
3. Variable costs are costs that vary on a per unit basis with changes in an activity base.
   1. True
   2. False
4. Direct materials and direct labor cost are examples of variable costs of production.
   1. True
   2. False
5. total variable costs change as volume of activity changes.
   1. True
   2. False
6. A mixed cost has characteristics of both a variable and a fixed cost
   1. True
   2. False