Answer:
$60,480
Explanation:
The computation of advertising be increased with profits remaining unchanged is shown below:-
Particulars                Current         Proposed
Units                     21,600           43,200
Sales                    $172,800         $345,600
                      ($8 × 21,600)      ($16 × 21,600)
Less: Variable expenses     $86,400         $172,800
                       (21,600 × $4)     (43,200 × $4)
Sales commission           -               $25,920
Less: Fixed expenses     $20,000            $20,000
Net income              $66,400          $126,880
So, the difference is $126,880 - $66,400
= $60,480