Local Co. has sales of 5100 milion and cost of sales of 56.0 millionIts selling general and administrative expenses are $500,000 and its research and development is $10 milion. It has arwal depreciation charges of $10 million and a tax rate of 35% a. What is Local's gross margin? b. What is Locals operating margin? c. What is Local's net profit margin? d. If Local Co. had an increase in selling compenses of $300,000, how would that allect each of its margins