Answer:
The answer is $2,857.14 Â Â
Explanation:
Let us assume Sales be $500 per month Â
                         Monthly  Â
Sales                   $500  Â
Less: Variable Cost(72%) Â Â $360 Â Â
Contribution(will be 28%) Â Â $140 Â Â
Less: Fixed Cost(Assume) Â Â Â 0 Â Â
Operating Income           $140  Â
If there should be an increase of $800 per month in the operating Income
Revised Operating Income $140 + $800 = $940 Â
Therefore Contribution is equal to $ 940 Â
If Contribution is $940 equal to 28%, then Sales be 100% Â
$940 ÷ 28%  Â
$3,357.14 Â Â
Therefore additional increase in Sales revenue required per month
$3,357.14 - $500 Â Â
$2,857.14 Â Â