I need help journalizing these transactions:

June 15: Received a purchase order from the Locker Room. Created a corresponding sales order to deliver 3 Specialist Tennis Raquets to this customer for $380 each plus 5% sales tax, Invoice No. 365. **I think per the revenue recognition rule, revenue is recognized once the items are delivered to the customer, not when it's incurred like in this purchase order. The tennis raquets were delivered to customer on June 28 (see below). So how would you journalize this?

June 18: The Locker Room paid $9,400 in partial payment of their account (More info about this: at this time, we have $21,147 [excluding the purchase order from June 15] in Accounts Receivable for Locker Room, denoting that Locker Room owes us that much amount of money.) ***I think we debit cash for $9,400 and credit A/R-Locker Room for $9,400, but is there more that needs to be done? I feel like so but correct me if I'm wrong.

June 21: Returned 2 faulty Signed Rugby Balls, originally purchased for $160 each, to Extreme Sports Inc. Received a Credit Memorandum for $320.

June 28: Delivered 3 Specialist Tennis Raquets to The Locker Room for $380 each, plus 5% sales tax, Invoice No. 365. These items were ordered on the 15th.

June 30: Purchased 20 Specialist Tennis Raquets with cash for a list price of $200 each. A trade discount of 20% applies, Check No. 743.