if the cost of goods sold is $ 400,000 and credit purchases is $250,000. the inventory balance at 1/1 is $20,000 and at 31/12 is $24,000. the inventory days turnover is

a.

29.2 days

b.

32.12 days

c.

21.9 days

d.

20.1 days

A measure of the percentage of each dollar of sales that results in net income is

a.

assets turnover

b.

profit margin.

c.

return on stockholders' equity.

d.

return on assets.