Q. Compute the present value?
The offer for the manufacturing rights is for a ten-year period.
Annual after-tax cash flow after Year 4 = $660000
Present value of this cash flow over six years at 12% = 660000 × 4·111 = $2713260
Present value of post Year 4 cash flows = 2713260 × 0·636 = $1725633
This net present value is equal to an annual benefit of 534383/ 5·650 = $94581
The after-tax value of the offer of $300,000 per year for 10 years = 300000 × 0·75 = $225000
In the lack of other information the offer should be accepted.
An alternative approach is to compute the present value of the offer
300000 × 0·75 × 5·650 = $1271250
Ever since this is greater than the NPV of investing by $736867 the offer should be accepted.