Question 13 (3 points) ABC Inc. produces cup holders. Total manufacturing costs are $450,000 when 30,000 holders are produced. Of this amount, total variable costs are $150,000. What are the total production costs when 60,000 holders are produced? (Assume the same relevant range for both production levels.) O a) $600,000 Ob) $900,000 Oc) $610,000 Od) $820,000