Gray Company uses the gross method to account for purchase discounts and the periodic inventory system. October 4 Purchased goods from Ross Company on account, $15,000, terms 1/10, n/30. October 10 Returned merchandise to Ross Company that was previously purchased on account, $1,700. October 12 Paid the amount due to Ross Company. 

Required: Journalize Gray Company's transactions on October 4, October 10, and October 12.