Answer: 56 dollars
Explanation:
Revenue/cost product B product C Differential cost
Cost of goods sold 30 55 25
Cost of production 28 59 31
Total 58 114 56
Net operating income 2 -4
The differential cost of producing product C is 56 dollars (114 - 58)
Conclusively, Yasmin Co should stick to the production of of Product B because it has a higher net income of 2.