Answer:
$36,070
Explanation:
Given that,
Contribution margin ratio = 61%
Fixed monthly expenses = $47,500
sales = $137,000
Contribution margin:
= Sales × Contribution margin ratio
= $137,000 × 61%
= $83,570
Net income = Contribution margin - Fixed monthly expenses
          = $83,570 - $47,500
          = $36,070
Therefore, the best estimate of the company's net operating income in a month is $36,070.