I asked this question already and part b was the wrong answer. Please help!

Depreciation; PV Yankee Freight provides truck freight services throughout the northeast United States. The firm is considering an investment in improved logistics management requiring a mainframe computer and communications software, which would cost $900,000 and have an expected life of eight years. For tax purposes, the investment will be depreciated using the straight-line method, with no salvage value. The company's cost of capital and tax rates are 8 and 30 percent, respectively. a. Compute the present value of the depreciation tax benefit. Note: Round your final answer to the nearest whole dollar. $ b. Assume instead that Yankee Freight uses the double-declining-balance method of depreciation for tax purposes with a five-year life. Compute the present value of the depreciation tax benefit. Note: Round your final answer to the nearest whole dollar. $