Answer:
Operating income will increase by $16,000. This is not given as one of the options.
Explanation:
The difference between the sales and variable expense gives the contribution margin. The contribution margin net the fixed cost gives the operating income or loss.
                           D             E           F
Sales revenue               $90,000     $40,000     $30,000
Variable costs               ($40,000)    ($10,000)    ($10,000)
Contribution margin          $50,000     $30,000     $20,000
Fixed costs                 ($10,000)    ($5,000)    ($25,000)
Operating income (loss) Â Â Â Â Â Â $40,000 Â Â Â Â $25,000 Â Â Â ($5,000)
The total operating income is
= $40,000 + $25,000 + ($5,000)
= $60,000
Should the fixed costs of F be eliminated, the operating income/(loss) of F
= $21,000 - $5,000
= $16,000
This is the net increase in the total operating income.