I am trying to journalize a couple transactions and I want to make sure I have them right.

Small Bicycle Store's inventory system is perpetual FIFO. On Oct.1, there were 25 ten speed bicycles that cost of $150 each in inventory. Journalize the following transactions:
Purchased 20 bikes for $150 each from the lyon's bicycle shop, terms 2/10,n/30.
Purchase Inventory 3.000
Accounts Payable 3,000

Paid Freight of $80 on the October 4 purchase
Inventory 80
cash 80

Sold 10 bikes to team america for $225 each, terms 2/10,n/30
(this one I am having problems with)
Accounts Receivable 2250
sales revenue 2250

issued a credit memo to team america for the return of a defective bike
purchase ret. & Allow. 225
accounts receivable 225

inventory 150
cost of goods sold 150

paid lyons bicycle company in full, less discount
accounts payable ????
cash ???
inventory ???