[Each transaction takes place at the end of the business day.] Day Activity Cash effect May 15 Receive 20 cases of designer pens none Jun 30 Pay for pens -$3,250 Jul 15 Sell pens on credit none Sep 10 Collect receivables $10,500 How many days are in the accounts receivable period? A) 61 days OB) 46 days OC) 57 days D) 118 days E) 72 days