Grace Co. can further process Product B to produce Product C. Product B is currently selling for $20 per pound and costs $16 per pound to produce. Product C would sell for $42 per pound and would require an additional cost of $10 per pound to produce. The differential revenue of producing and selling Product C is Oa. $22 per pound Ob. $42 per pound Oc. $32 per pound Od. $26 per pound