Answer:
The company's net operating income for May is $39,420
Explanation:
Sales revenue = $89,000
Variable costs = $89,000 × (1 - 78%)
= $89,000 × 0.22
= $19,580
Fixed costs = $30,000
Therefore, net operating income = Sales revenue - variable costs - fixed costs
= $89,000 - $19,580 - $30,000
= $ 39,420