Lowes is a home improvement retailer. During 2017 Lowes had net credit sales (in millions) of $24,000. The beginning and ending balances of net accounts receivables (in millions) for 2017 were $3,600 and $3,800, respectively. What is Lowes' accounts receivable turnover ratio for 2017 (rounded to the nearest tenth)?

a) 7.5 times

b) 6.7 times

c) 6.5 times

d) 0.2 times