A graph of a flexible budget formula reflects fixed costs of $50,000 per month and total costs of $65,000 at a volume of 3,000 units. Assuming the relevant range is 1,000 to 20,000 units, the graph would reflect total monthly costs at 18,000 units of what dollar amount?

A.

$65,000

B.

$90,000

C.

$205,000

D.

$ 140, 000