Marco Company reported net credit sales of $1,500,000, cost of goods sold of $800,000, and gross profit of $700,000. Accounts Receivable were $175,000 and $225,000 at the beginning and end of the period, respectively. What is the accounts receivable turnover, rounded to two decimal places?
a. 6.67 times
b. 3.50 times
c. 4.00 times
d. 7.50 times