Solution:
Given,
Fulton made 16,000 copies
Paid a total of $630 in March
Firm paid $600 for 14,000 copies
The variable cost per unit is (High − Low costs) ÷ (High − Low Units)
= ($630 − $600) ÷(16,000 − 14,000) = $0.015 per copy.
Variable costs (using the low level) = 14,000 × $0.015 = $210;
Total costs − variable costs = fixed costs
(or $600 − $210 = $390) Units × Variable cost per unit + Fixed costs
= (12,000 × $0.015) + $390 = $570.00.