a project with a life of $7$ years is expected to provide annual sales of $390,000$ and costs of $277,000.$ The project will require an investment in equipment of $685,000,$ which will be depreciated on a straight line method over the life of the project. You feel that both sales and costs are accurate to $+/-10$ percent. The tax rate is $21$ percent. what is the annual operating cash flow for the best case scenario?