Meg O'Byte wants to buy a new computer for her business for Internet access on a cable modem. The computer system cost is $$5,100.$ The cable company charges $$200($including the cable modem$)$ for installation and has a $$50$ a month usage fee for businesses, paid at the end of the month. Meg expects to buy the system with a $$100$ down payment, financing the balance at $8$ percent over the next $4$ years. She will sell the computer for $$1,000$ when she upgrades. She expects a $$500$ a month increase in cash flow and is in the $25$ percent tax bracket.

a$.$ The start$-$up costs are

b$.$ The PVC is

c$.$ The PVB is

d$.$ The monthly payment for the computer is