Could someone help me with the attached accounting problem please?

Delta Company used the periodic inventory system for purchase & sales of merchandise. Discount terms for both purchase & sales are, FOB Destination, 2/10, n30 and the gross method is used. - Delta Company sold on account $3,000 of merchandise to Alpha Company on May 2, 2016. Selling price was $4,500 - Alpha Company returned, to Delta Company, $300 of this merchandise on May 3, 2016. Merchandise was sold for $450 - Freight charges related to this transaction of $150 were paid by Delta Company. Use this information to prepare Delta Company's Journal entry (without explanation) for the payment for merchandise on May 15. If no entry is required then write "No Entry Required." General Journal: Date Accounts Debit Credit