Northern Industries has accounts receivable of $42,300, inventory of $61,200, sales of $544,200, and cost of goods sold of $393,500. What is the firm's days' sales outstanding? Is the firm more or less efficient than its competition that has 30 days sales outstanding?

A. 28.37 days, less

B. 28.37 days, more

C. 12.87 times, more

D. 39.24 days, less

E. 39.24 days, more