On September 1, Boylan Office Supply had an inventory of 35 calculators at a cost of $14 each. The company uses a perpetual inventory system. During September, the following transactions occurred. Sept. 6 Purchased with cash 90 calculators at $23 each from Guthrie Co. Sept. 9 Paid freight of $90 on calculators purchased from Guthrie Co. Sept. 10 Returned 5 calculators to Guthrie Co. in exchange for $120 cash (including reimbursement for freight fee) because they did not meet specifications. Sept. 12 Sold 27 calculators costing $24 (including freight) for $32 each to Lee Book Store, terms n/30. Sept. 14 Granted credit of $32 to Lee Book Store for the return of one calculator that was not ordered. Sept. 20 Sold 34 calculators costing $24 for $36 each to Orr's Card Shop, terms n/30.