ocal Co$.$ has sales of $$$$10\mathrm{.}610\mathrm{.}6$ million and cost of sales of $$$$5\mathrm{.}75\mathrm{.}7$ million. Its$$ selling, general and administrative expenses are $ $510$ comma $000$$$510,000$ and its research and development is $$$$1\mathrm{.}51\mathrm{.}5$ million. It has annual depreciation charges of $$$$1\mathrm{.}21\mathrm{.}2$ million and a tax rate of $20\%20\%.$

a$.$ What is LocalLocal$\text{'}$s gross$$ margin?

b$.$ What is LocalLocal$\text{'}$s operating$$ margin?

c$.$ What is LocalLocal$\text{'}$s net profit$$ margin?