Answer:
TMachine B will be the most benefical.
Step-by-step explanation:
1,000 5 year savings for $300
1,000 5 year saving of 400 and decreasing 50 per year
interest rate 7%
TIR first machine: 15,2382%
TIR second machine: 17,4663%
The better option would be the second machine, because it produce a better yield and therefore it will have a better NPV when calculate a 7% rate