Response to the following questions:
1. How are sales to customers using MasterCard and VISA recorded?
2. What is the meaning of (a) 2/10, n/30; (b) n/90; (c) n/eom?
3. What is the nature of
(a) a credit memorandum issued by the seller of merchandise,
(b) a debit memorandum issued by the buyer of merchandise?
If possible, please give examples to better understand your answers.