Pablo Company is considering buying a machine that will yield income of $2,100 and net cash flow of $17,300 per year for three years. The machine costs $52,200 and has an estimated $6,600 salvage value. Pablo requires a 15% return on its investments. Compute the net present value of this investment. (PV of $1, FV of $1, PVA of $1, and FVA of $1) (Use appropriate factor(s) from the tables provided. Negative amounts should be indicated by a minus sign.