Record journal entries for the following transactions of Furniture Warehouse.

A.	Aug 3: Sold 20 couches at $500 each to a customer, credit terms 2/15, n/30, invoice date August 3; the couches cost Furniture Warehouse $150 each.
B.	Aug 8: Customer returned 2 couches for a full refund. The merchandise was in sellable condition at the original cost.
C.	Aug 15: Customer found 6 defective couches but kept the merchandise for an allowance of $900.
D.	Aug 18: Customer paid their account in full with cash.

If an amount box does not require an entry, leave it blank. Assume the perpetual inventory system is used.