Problem: One can view the production and leasing of an (automatic) attaching machine as a multi-period "annuity." Money is spent in year zero in order to generate a stream of cash flows (positive net cash flows, hopefully) over an average of ten years. After ten years, a machine is renovated and then generates positive cash flows again for another ten years, on average. Try to structure the time-phased cash flows for this annuity for an "average" automatic attaching machine using 1986 costs and prices