If the Dept displacement rate is 6% and the cost of borrowing machine is 10%, and the adjusted discount rate = 7.6%.So what is the Marginal tax rate? write the formula.

If purchasing cost is $68,000 and no tax benefits are expected and not paying taxes now. What is the lease value if lease payment for five years is $ 12,500 and PV pf lease payment is at 10%, & lost residual value before tax $5,000 is for 5 years residual at 10% borrowing rate. in step 10 use tax marginal = 0.4