Andrea Sampri Sporting Goods Store purchases sporting goods merchandise on account from various vendors. The terms of the purchase are 2/10, n/30. The delivery date and invoice date is May 15, 2015. The amount of the total amount of the invoice is $12,000. Andrea uses the periodic inventory system and the gross method of recording. Required: 1) Record the invoice on May 15, 2015. 2) Record the payment if payment is made on May 20, 2015. 3) Record the payment is payment is made on May 30, 2015.