Riverton Mining plans to purchase or lease $ 190,000 worth of excavation equipment. If purchased, the equipment will be depreciated on a straight-line basis over five years, after which it will be worthless. If leased, the annual lease payments will be $43,280 per year for five years. Assume Riverton's borrowing cost is 7.5 %, its tax rate is 40%,

and the lease qualifies as a true tax lease.

a. If Riverton purchases the equipment, what is the amount of the lease-equivalent loan?

b. Is Riverton better off leasing the equipment or financing the purchase using the lease-equivalent loan?

c. What is the effective after-tax lease borrowing rate? How does this compare to Riverton's actual after-tax borrowing rate?