RAM's Company has a relevant range of production between 15,000 and 30,000 units. The following cost data represents average variable costs per unit for 25,000 units of production.

Direct materials$ 13

Direct labor$8

Fixed manufacturing overhead$6

Variable manufacturing overhead$3

Required:

a) If 25,000 units are produced, what is the variable cost per unit?

b) If 16,000 units are produced, what is the variable cost per unit?

c) Comment briefly on your answers to (a) and (b).

d) If 18,000 units are produced, what are the total variable costs?