the direct labor rate variance is the difference between the a. actual costs and the standard costs b. actual costs and the actual hours at the standard rate c. actual rate and the standard rate d. actual hours at the standard rate and the standard costs

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?