The net initial investment for a piece of construction equipment is $1,000,000. The equipment has an 6 -year useful life. Annual total cash inflows are expected to increase by $240,000,$300,000,$340,000,$480,000,$500,000,$600,000 for year 1 to year 6 . What is the payback period? A. 6 years B. 3.25 years C. 3.75 years D. 4.25 years