Can you show me how to do this in a financial calculator 4. A proposed expansion project is expected to increase sales of JL Ticker's Store by $41,000 and increase cash expenses by $21,000. The project will cost $28,000 and be depreciated using straight-line depreciation to a zero book value over the 4-year life of the project. The store has a marginal tax rate of 30 percent. What is the operating cash flow of the project using the tax shield approach?