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A firm is considering an expansion project that will last forever. The project requires an immediate purchase of a new piece of equipment that costs $600, 000. The equipment will be fully depreciated using straight-line method over the next four years. The project will generate annual sales of $800, 000 and incur additional annual costs of $200, 000 (all costs except depreciation) for each year. Due to this project, the firm has to immediate increase the inventory by $100, 000 and the accounts payable by $50.000. The corporate tax rate is 30%. Calculate the project cash flow for each year (0, 1, 2, 3, and 4). .Assume that the cash flow will increase by 2% forever beyond year 4. Evaluate the project using Payback period, Discounted payback period, and NPV .Assume that the discount rate for the project is 15%