has sales of $$$$10\mathrm{.}5$ million and cost of sales of $$$$5\mathrm{.}8$ million. Its$$ selling, general and administrative expenses are $ $450$ comma $000$ and its research and development is $$$$1\mathrm{.}1$ million. It has annual depreciation charges of $$$$1\mathrm{.}4$ million and a tax rate of $20\%.$

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

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

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