Locar Corporation had net sales last year of $18,600,000 (of which 20% were installment sales). It also had an average accounts receivable balance of $1,380,000. Credit terms are 2/10, net 30. Based on a 360-day year, Locar?s average collection period last year was

26.2 days.
26.7 days.
27.2 days.
33.4 days.