Question: A firm's flexible budget for 12,000 units of production showed sales, $48,000; variable costs, $18,000; and fixed costs, $16,000. The operating income expected if the firm produces & sells 16,000 units is:
[A] $ 2,667
[B] $18,667
[C] $30,000
[D] $35,000
[E] $24,000