Assume that on September 1 Office depot had an inventory that included a variety of calculators. The company uses a perpetual inventory system. During September these transactions occurred. Sept.6 Purchased calculators from Green Box co. at a total cost of $1,620,terms n/30. sept 9 paid freight of $50 on calculators purchased from Green box co. sept10 returned calculators to Green Box Co. for $38 credit because they did not meet specifications. Sept 12 Sold calculators costing $520 for $690 to University Book Store terms n/30 Sept 14 granted credit of $45 to University book store for the return of one calculator that was not ordered. The calculator cost $34. Sept 20 Sold calculators costing $570 for $760 to compus card shop, terms n/30 Journalize the September transactions