Answer:
Internal Rate of Return (IRR) = 10%
Explanation:
The computation of IRR for the new production system is shown below:-
PV factor for Internal Rate of Return = Investment cost ÷ Annual net cash savings
PV factor for Internal Rate of Return = $4,607,200 ÷ $800,000
= 5.759
The PV factor 5.759 in Present value of a Annuity of $1 table for 9 years is closest to 10%
Internal Rate of Return (IRR) = 10%