Block pricing A. is a form of nonlinear price discrimination. B. is pricing where one price is charged for the first block of units purchased, and different prices for subsequent blocks. C. can be either use increasing or decreasing prices for blocks purchased. D. All of the above.

The owner of firewood to go is considering buying a hydraulic wood splitter which sells for $50,000. he figures it will cost an additional $100 per cord to purchase and split wood with this machine, while he can sell each cord of split wood for $125. if, for this machine, design capacity is 50 cords per day, effective capacity is 40 cords per day, and actual output is expected to be 32 cords per day, what would be its efficiency?