Can you help me figure out the answer and how?

Can you help me figure out the answer and how?  Thank you.  On answer key they gave the answer but I don't know how to do it.

Thanks again.

The Whilst Co. is analyzing a project that has projected sales of $189,400 and costs of $102,300. The project requires an investment in inventory of $15,000 plus another $28,000 in accounts receivable. Fixed assets of $80,000 are needed and belong in a 30% CCA class.  Accounts payable will increase by $36,000. An interest expense of $11,000 will be incurred annually. The project has a life of 3 years. At the end of the three years, the equipment has an estimated market value of $26,000. The company requires a 14% rate of return and is in the 34% marginal tax bracket. What is the net present value of this project?

                A)       $65,887

                B)       $68,023

                C)       $81,921

                D)       $91,425

                E)        $93,608