Local Co. has sales of $ 10.9 million and cost of sales of $ 6.2 million. Its selling, general and administrative expenses are $510, 000 and its research and development is $1.4 million. It has annual depreciation charges of $1.2 million and a tax rate of 35 %. Local's gross margin is 43.12%, its operating margin is 14.59%, and its net profit margin is 9.48%. If Local Co. had interest expense of $900,000, how would that affect each of its margins?