Firm A has three product lines with the following revenues and expenses:

A

B

C

Sales revenue

$80,000

$42,000

$60,000

Variable expenses

$65,000

$21,000

$12,000

Contribution margin

$15,000

$21,000

$48,000

Fixed expenses

$19,000

$15,000

$17,000

Operating income(loss)

($4,000)

$6,000

$31,000

All fixed expenses are unavoidable. What is the effect on operating income of discontinuing product line A?

Group of answer choices

Decrease $15,000

Increase $19,000

Increase $15,000

Increase $4,000