Answer:
D) increase at a faster rate than the costs associated with those sales.
Explanation:
If the break even point was reached during the 20th day of the month, then any revenue generated during the remaining 10-11 days will increase net profits. The amount of net profit increase will be determined by the contribution margin of each service provided. The contribution margin = net sales - variable costs. Since the fixed costs have already been covered, the contribution margin will be equal to the net profit.