Answer b, if you can be generous please answer C as well, I will certainly upvote, thanks

a Local Co. has sales of $10.4 million and cost of sales of $6.3 million. Its selling, general and administrative expenses are $460,000 and its research and development is $1.3 million. It has annual depreciation charges of $1.2 million and a tax rate of 35%. a. What is Local's gross margin? b. What is Local's operating margin? c. What is Local's net profit margin? a. What is Local's gross margin? Locals gross margin is 39.4 % (Round to one decimal place.) b. What is Local's operating margin? Local's operating margin is %. (Round to one decimal place)