Answer:
a. Account Receivables turnover = Sales / Average Account Receivables
Account Receivables turnover = $3,150,000 / $210,000
Account Receivables turnover = 15
b. Number of days sales in receivables = 365 / Account Receivables turnover
Number of days sales in receivables = 365 days / 15
Number of days sales in receivables = 24.33 days