Using the perpetual inventory system, journalize the entries for the following selected transactions: a. Sold merchandise on account for $12,000, terms n/30. The cost of the goods sold was $6,500. b. Sold merchandise to customers who used MasterCard and VISA, $9,500. The cost of the goods sold was $5,300. C. Sold merchandise to customers who used American Express, $2,900. The cost of the goods sold was $1,700. d. Paid an invoice from First National Bank for $385, representing a service fee for processing MasterCard and VISA sales e. Paid an invoice from American Express for $75 fee. If an amount box does not require an entry, leave it blank. a