Please use Excel

During the year, Bob Discount Tire paid a tax of $83,400. The firms cost of goods sold and selling expenses were $534,000 and $224,000, respectively. Bob also had notes payable of $890,000. These notes carried an interest rate of 5 percent. Depreciation was $139,000. Senbets marginal tax rate was 35 percent. a. What was Bobs net income? b. What must have been Bobs gross sale? c. What was Bobs operating cash flow?