Required Information Determine 10%-per-year present worth (PW) of taxes over a 6-year study period. P= $100, S=0, GI - OE = $50, and Te = 30%. Use Modified Accelerated Cost Recovery System (MACRS) to determine the present worth (PW) of the tax with n=5 years. The present worth (PW) of the tax amount is $ 28.43