4) Oceanview Manufacturing is considering an investment that would require an initial net investment of S660,000. The following revenues/expenses relate exclusively to the investment: Sales 5370,000 $20,000 Variable expenses Contribution margin $350,000 Fixed expenses Salaries expense $35,000 20,000 40,000 $95,000 255,000 Rent expense Depreciation expense Total fixed expenses Operating income The investment will have a residual value of $50,000 at the end of its 12 year useful life. What is the payback period for this investment? A) 1.78 years B) 3.07 years C) 2.59 years D) 2.24 years