Answer:
A reduction of $12,500 in net operating income
Step-by-step explanation:
The net operating income/loss is the difference between the sales and the total costs.
The change in the company's net operating income is the net of the increased commission and the total decrease in salaries. The commission is a variable cost that is dependent on the total number of units sold.
Hence the overall effect on the company's monthly net operating income of this change
= $46,000 - ($9 * 6500)
= ($12,500)