Please, try not to use Excel or any Computer to solve this problem. Use formulas, math and written explanation to solve the problem. Thanks.

During 2019, Rainbow Umbrella Corp. had sales of $750,000. Cost of goods sold, administrative and selling expenses, and depreciation expenses were $610,000, $125,000, and $170,000, respectively. In addition, the company had an interest expense of $60,000 and a tax rate of 21 percent. (Assume that interest is fully deductible.) a. What is the company's net income for 2019? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations.) b. What is its operating cash flow? (Do not round intermediate calculations.) a. Net income b. Operating cash flow