To determine the total revenue from sales of two products, P and Q, last month, which of the following statements is sufficient?

The correct answer to the question "To determine the total revenue from sales of two products, P and Q, last month, which of the following statements is sufficient?" is Option C: Both statements (A) and (B) together are sufficient..

The other options — A) Last month's revenue for product P was $10,000., B) Last month's revenue for product Q was 20% higher than product P., D) Neither statement alone nor both statements together are sufficient. — are incorrect for this GMAT Exam Prep question. As explained above: Statement (A) gives P's revenue. Statement (B) allows calculating Q's revenue based on P's. Together, both P and Q's revenues can be found and summed for total revenue.