Journalize the entries for the following transactions:
Sold merchandise for cash $12, 050. The cost of merchandise sold was $9, 000.
Sold merchandise on account $6, 000.The cost of merchandise sold was $4, 000.
Sold merchandise to customers who used MasterCard and Visa $30, 780. The cost of the merchandise sold was $20, 000
Sold merchandise to customers who used American Express $17, 650. The cost of the merchandise sold was $10, 500
Received an invoice from National Credit Company for $1, 900.00 representing a service fee paid for processing MasterCard, Visa and American Express sales.