Arlington Company's highest point of total cost was $61,875 in June. Their point of lowest cost was $52,250 in December. The company makes a single product. Production volume in June was 7,000 units; production volume in December was 12,500 units. If the production volume is 9,000 units, what will the total costs be?

Which one is the right answer?

$55,000

$55,750

$45,600

$57,062

Provide the the mechanical EXPLANATION...