The MARR is 7% per year, capital investment is $118,894, annual expense is $32,856, annual revenue is $60,700, market value at the end of useful life is $11,768. The useful life is 8 years. Use the...

The MARR is 7% per year, capital investment is $118,894, annual expense is $32,856, annual revenue is $60,700, market value at the end of useful life is $11,768.  The useful life is 8 years. Use the contaminated assumption. The study period is 5 years. What is the FW?