Can someone please show me how this is solved?

Dog Up! Franks is looking at a new sausage system with an installed cost of $288,600. This cost will be depreciated straight-line to zero over the project's 3-year life, at the end of which the sausage system can be scrapped for $44,400. The sausage system will save the firm $88,800 per year in pretax operating costs, and the system requires an initial investment in net working capital of $20,720.

Required:

If the tax rate is 35 percent and the discount rate is 12 percent, what is the NPV of this project?

The answer MUST be one of the following possible answers:

	$-48,554.66
	$-57,252.90
	$-54,526.58
	$-69,096.64
	$-75,068.55