Davis Company had net credit sales of $600,000 in the year and cost of goods sold of $300,000. The balance in Accounts Receivable at the beginning of the year was $100,000 and at the end of the year was $200,000. What were the receivables turnover and collection period ratios, respectively? O a. 5.3 and 69 days O b. 3.0 and 122 days O c. 4.0 and 91 days O d. 6.4 and 57 days