Does this question require me to calculate using NOWC?

LeXing Ltd is a manufacturer of data modems. It has recently hired a marketing consultant at a cost of $200,000 to carry out a feasibility study on a new 4-year project to manufacture USB-Modems for the export market. LeXing owns an industrial property that was bought 3 years ago at a cost of $1.2 million for investment purpose, and its original plan was to sell the property at the current market value of $1.3 million on an after-tax basis. Since the new project will be occupying the premises, the company now plans to sell the property only at the end of 4 years, but at an estimated value of $1.4 million on an after-tax basis. The new project also requires $400,000 investment in fixed assets, which have an estimated salvage value of $60,000 at the end of the project. The assets will be depreciated fully on a straight-line basis over 4 years (ignore salvage value when computing annual depreciation). Annual sales generated from this project are estimated as follows:

Year 1 sales :$2,000,000

Year 2 sales :$2,500,000

Year 3 sales :$3,000,000

Year 4 sales :$4,000,000

Total annual operating costs (not including depreciation) are estimated to be 60% of sales. Due to this new project, the company's current assets will increase by $100,000, and accounts payable will also increase by $40,000. All other components of operating working capital are expected to stay the same. The changes in operating working capital are expected to be completely recovered at theend of the project. The project will also cause its after-tax cash flows from its desktop modem products to decrease by $30,000 per year. LeXing's marginal corporate tax rate is 30%.

Compute the relevant annual project free cash flows (i.e. cash flow for Year 0 to Year 4) for evaluating this new project.