PC Shopping Network may upgrade its modem pool. It last upgraded 2 years ago, when it spent $135 million on equipment with an assumed life of 5 years and an assumed salvage value of $30 million for tax purposes. The firm uses straight- line depreciation. The old equipment can be sold today for $100 million. A new modem pool can be installed today for $180 million. This will have a 3- year life and will be depreciated to zero using straight- line depreciation. The new equipment will enable the firm to increase sales by $23 million per year and decrease operating costs by $11 million per year. At the end of 3 years, the new equipment will be worthless. Assume the firm's tax rate is 30% and the discount rate for the projects of this sort is 11%.

a. What is the net cash flow at time 0 if the old equipment is replaced?

b. What are the incremental cash flows in years 1, 2, adn 3?

c. What is the NPV of the replacement project? d. What is the IRR of the replacement project?