Net credit sales total $ 1 comma 431 comma 000. Beginning and ending accounts receivable are $ 69 comma 000 and $ 37 comma 000​, respectively. Calculate the​ days' sales outstanding. ​(Round interim calculations to two decimal​ places, XX.XX and the​ days' sales outstanding​ (DSO) up to the next whole​ day.) A. 11 days B. 20 days C. 14 days D. 9 days