Yasmin Co. can further process Product B to produce Product C. Product B is currently selling for $31 per pound and costs $28 per pound to produce. Product C would sell for $55 per pound and would require an additional cost of $24 per pound to produce. What is the differential cost of producing Product C?

a.$24 per pound

b.$28 per pound

c.$55 per pound

d.$31 per pound