If the accounts receivable balance on 1/1/20X1 is $26,000, the accounts receivable balance on 12/3121X1 is $34,000, net credit sales are $270,000, and gross profit is $120,000, what is the accounts receivable turnover for 20X1?

a). 3.5 times

b). 4.0 times

c). 7.9 times

d). 9.0 times