Jones Co. can further process Product B to produce Product C. Product B is currently selling for $60 per pound and costs $42 per pound to produce. Product C would sell for $82 per pound and would require an additional cost of $13 per pound to produce. What is the differential revenue of producing and selling Product C? a. $22 per pound b. $42 per pound c. $45 per pound d. $18 per pound