$4.$

Prepare the necessary journal entries on a table to record the following transactions, assuming Tammy Company uses a perpetual inventory system.

$($a$)$

Tammy sells $$40,000$ of merchandise, terms $1/10,$ n$/30.$ The merchandise cost $$28,000.$

$($b$)$

The customer in $($a$)$ returned $$3,000$ of merchandise to Tammy. The merchandise returned cost $$2,100.$

$($c$)$

Tammy received the balance due within the discount period.