A project proposal submitted to you for evaluation follow: Investment, including depreciable assets of P495,000 with economic life of six years) - Php 865,000 Annual sales revenue - PhP 750,00 Variable cost of sales - 43.5% Annual cash operating costs - 295,000 Income tax rate - 25% Required: a. Annual cash return, payback period and internal rate of return. b. If the corporate cost of capital is 8%, should the project be implemented ?