Grace Co. can further process Product B to produce Product C. Product B is currently selling for $21 per pound and costs $14 per pound to produce, Product C would sell for $40 per pound and would require an additional cost of $10 per pound to produce. The differential revenue of producing and selling product C is 3. $30 pet poond 2. 540 per pound :. 519 per porm d. 526 pet pound