answer each question with the needed short

answer :

a) a firm has annual sales of $113, $41 of inventory, and $50 of accounts receivable what is its inventory turnover ratio

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b) A company has $157 billion of sales and $17 billion of net income. it's total assets are $10 billion. The companies total assets equal total invested capital, and its capital consists of half debt and half common equity. the firm's interest rate is 5%, and it's tax rate is 40%.

what is. its Net Profit Margin? ( write answer in decimals : instead of 5% write 0.05)

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c) a firm has annual sales of $108, $50 of inventory, and $39 of accounts receivable. what is its DSO?

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