Purchase-Related Transactions Showcase Co., a furniture wholesaler, sells merchandise to Balboa Co. on account, $30,700, terms n/30. The cost of the merchandise sold is $18,400. Showcase issues a credit memo for $5,200 as a price adjustment prior to Balboa Co. paying the original invoice. a. Journalize Balboa Co.'s entry for the purchase. If an amount box does not require an entry, leave it blank. b. Journalize Balboa Co.'s entry for the credit memo. If an amount box does not require an entry, leave it blank. c. Journalize Balboa Co.'s entry for the payment of the invoice. If an amount box does not require an entry, leave it blank