Ski$$ Boards, Inc., wants to enter the market quickly with a new finish on its ski boards. It has three$$ choices:

$($a$)$ refurbish the old equipment at a cost of $ $800$$$800,$

$($b$)$ make major modifications at the cost of $ $1$ comma $100$$$1,100,$ or

$($c$)$ purchase new equipment at a net cost of $ $1$ comma $800$$$1,800.$