The Wheatland Company purchased merchandise on account from a supplier for $30,000, terms 1/10, n/30. The Wheatland

Question:

The Wheatland Company purchased merchandise on account from a supplier for $30,000, terms 1/10, n/30. The Wheatland Company returned $8,000 of the merchandise and received full credit.
a. What is the amount of cash required for the payment within the discount period?
b. Under a perpetual inventory system, what account is credited by The Wheatland Company to record the return?