Journal Entries & Adjusting Journal Entries

Nov. 15-
Purchased $1,600 of merchandise on account from Martin Co, terms 1/30; paid $60 of associated freight charges in cash.
My answer:
Merchandise Inventory $1600
Accounts Payable $1600
Cash $60
Freight Expense $60

Nov. 17-
Riverside Company returned $200 (cost $120) of merchandise (from the 11/12 transaction) for credit to its account.

My answer:
Sales returns & allowances $200
Sales of merchandise-charge $200

Nov. 18-
Purchased land for a future building site for $6000. Made a $2000 down payment and signed a 12%, 90-day note payable for the balance.

My answer:
Land $6000
Cash $2000
Notes Payable $4000
?

Nov. 22-
Collected the Riverside Company account for the 11/12 sale less the return (11/17) and the cash discount. 11/12 sale $23000 terms 2/10; net 30

My answer:
Cash $22340
A/R $22340

Please let me know if I am correct and help please on Nov. 18th!