The Noxcy Trading has a net income of $$147,540.$ There are currently $27\mathrm{.}55$ days' sales in receivables. Total assets are $$744,000,$ total receivables are $$158,150,$ and the debt$-$equity ratio is $35.$

a$.$ What is the company's profit margin?

b$.$ What is the company's total asset turnover?

c$.$ What is the company's ROE?