Company A can purchase machinery for $40,000 each, can be expected to have a useful life of seven years, with no salvage value. If Company A wishes to earn an annual after tax, time adjusted rate of return of at least 16% on its funds, compute the minimum after-tax cash flow that each grader would have to generate to attain this rate of return. (For 16%, 7 years, the present value factor is 4.039).