The following information is available for Market, Incorporated and Supply, Incorporated at December 31. Accounts Market, Incorporated $58,600 Accounts receivable Supply, Incorporated $76,000 2,856 Allowance for doubtful accounts 2,548 Sales revenue 636,960 927,100 Required a. What is the accounts receivable turnover for each of the companies? b. What is the average days to collect the receivables? c. Assuming both companies use the percent of receivables allowance method, what is the estimated percentage of uncollectible accounts for each company?