Standard product management case study questions. One very hard question involving three boxes of potatoes, onions, and potatoes & onions that are mislabeled. How do you find which box contains what? The very hard final business math question was: "A dealer of ours buys $80,000 worth of printers to resell. They feel that to be competitive , they need a 15% discount on their current unit pricing, which they promise will result in a 30% increase in annual spend with us on these printers. Under the current arrangement, we make a 40% margin on the sales today. Do you take the deal?