Final answer:
To determine the monthly profit for a beauty salon from 80 manicures, we need information on expenses and the cost per manicure. Without this, we cannot accurately calculate the profit. Therefore, a definitive answer cannot be provided based on the given options.
Step-by-step explanation:
To calculate the monthly profit for a beauty salon giving 80 manicures, we will need additional information such as the cost per manicure, the expenses incurred, and other relevant financial data. Without this information, it is not possible to accurately determine the profit. Profit is generally calculated by subtracting the total expenses from the total revenue. If we assume that the revenue from 80 manicures is represented by one of the given options (a, b, c, or d), and that there are no expenses to subtract, the profit would be the selected amount. However, in a real-world scenario, we must consider expenses to determine the actual profit. Since the question does not provide any details on the expenses or the cost per manicure, we cannot provide a definitive answer.