A sales clerk in an electronics store earns commission on total weekly sales. What amount, in dollars, did the sales clerk earn as commission on last week’s total sales? (1) The electronic store pays sales personnel a commission rate of 2 percent on total weekly sales. (2) The amount of the sales clerk’s total weekly sales last week was $500 more than the sales clerk’s total weekly sales the previous week.

Data Sufficiency questions are exclusive to the GMAT.

Each Data Sufficiency question poses a question, followed by two statements. Your task is to evaluate the statements to determine at what point there is or is not sufficient information to answer the question.

Unlike the Problem Solving questions, you do not actually have to answer the question posed. Instead, you select one of five fixed answer choices that offer different options about the sufficiency of the information provided in the two statements.