can i know how to solve it with formulas and not excel please

Advantech, Inc is considering a new prodcut. The company spent $200,000 to develop the product. The estimated life of the product is 3 years and the estimated operating revenues and costs are the following: Sales 600,000 700,000 500,000 Operating costs 300,000 350,000 250,000 To produce this product the company will have to acquire a new equipment that costs $300,000. The equipment has a life of 5 years and will be depreciated straight line to zero. The company believes that the equipment can be sold in 3 year for $80,000. The new product does not require changes in the level of networking capital. The tax rate is 34% and the appropriate discount rate is 8%. a. Estimate the cash-flows associated with the project. b. Compute the NPV for the project. c. Should Advantech start with the production of the new product? Explain why