Prepare journal entries to record each of the following sales transactions of EcoMart Merchandising. EcoMart uses a perpetual inventory system and the gross method. Oct. 1 Sold fair trade merchandise for $1,500, with credit terms n/30, invoice dated October 1. The cost of the merchandise is $900. 6 The customer in the October 1 sale returned $150 of fair trade merchandise for full credit. The merchandise, which had cost $90, is returned to inventory. 9 Sold recycled leather merchandise for $700, with credit terms of 1/10, n/30, invoice dated October 9. Cost of the merchandise is $450. 11 Received payment for the amount due from the October 1 sale less the return on October 6.