15. Villon Company sells on terms that allow customers 30 days to pay for merchandise. If the result of the days sales outstanding (DSO) is less than the 30-day credit period, then customers are paying on time. Otherwise, they are paying late. By how many days early or late were the customers paying during 2020? Use a 365-day year in your calculations and assume that all sales were done on credit. Do not round your intermediate calculations. * Given: account receivable = 660000 sales= 4375000