c$.$ An initial outlay of $$27,500$ followed by an inflow of $$3,000$ followed by five years of inflows of $$5,500$ at a cost of capital of $10\%.($Recognize the last five inflows as an annuity, but notice that it requires a treatment different from the annuity in part b$.$ See Imbedded Annuities, Chapter $6,$ Page $272.)$