Looking for some assistance on problem 8-10 in Corporate Finance - Linking Theory to What Companies Do

Wilbur Corporation is considering replacing a machine. The replacement will cut operating expenses by $24,000 per year for each of the five years the new machine is expected to last. Although the old machine has zero book value, it has a remaining useful life of five years. The depreciable value of the new machine is $72,000. Wilbur will depreciate teh machine under MACRS using a 5-year recovery period and is subject to a 40% tax rate on ordinary income. Extimate the incremental operating cash flows attributable to teh replacement. Be sure to consider the depreciation in year 6.