Jim Corner, owner of Corner Bike Rentals, wants to start analyzing his company's quality. For each bike rental, there are four types of customer complaints: (1) bike not working properly, (2) wrong bike size, (3) bike uncomfortable, and (4) bike broken during operation. During the past week, his company rented 280 bikes. He received a total of twenty-six complaints. What is his company's DPMO for the past week? What is the Six Sigma level?