Answer:
a. What is the MRP?
marginal revenue product = marginal product of labor x marginal revenue per output unit
MRP = 1,500 packages x $0.10 per package = $150
marginal resource cost (MRC) = $100 (the cost of renting the delivery truck)
The company should add the delivery truck because MRP is higher than MRC.
b. Now suppose that the cost of renting a vehicle doubles to $200 per day. What are the MRP and MRC in this situation?
MRP = $150 (doesn't change from question a)
MRC = $200 (the cost of renting the delivery truck)
The company should not add the delivery truck because MRP is less than MRC.
c. Next suppose that the cost of renting a vehicle falls back down to $100 per day, but, due to extremely congested freeways, an additional vehicle would only be able to deliver 750 packages per day. What are the MRP and MRC in this situation?
MRP = 750 packages x $0.10 per package = $75
MRC = $100
The company should not add the delivery truck because MRP is less than MRC.