Answer: 
1. Decrease in Net Income of -$8,500 
2. Increase in Net Income of $50,500
3. Replace the old machine with Alternative B 
Step-by-step explanation:
1. 
Alternative A 
Cost to Buy New Machine -$117,000 
Cash received to trade in old machine $54,000 
Reduction in Variable Manufacturing Costs (($33,600*5 years ) - (22,700*5 years )) $54,500 
Total change in Net Income -$8,500 
 
 2.
Alternative B 
Cost to Buy New Machine -$118,000 
Cash received to trade in old machine $54,000 
Reduction in Variable Manufacturing Costs (($33,600*5years ) - (10,700*5 years )) $114,500
Total change in Net Income $50,500
3. Replacing the old machine with alternative B will result in an increased income of $50,500 so it is a good option.