When a buyer wants to buy a product or products, he or she requests for a catalog for the type of goods the intended merchant has. Then after receiving the catalog, they normally send a purchase order with specific instructions as to what is wanted and in what order and quantity.
The merchant in turn will deliver the order upon which the buyer confirms each and every product and upon satisfaction, he or she is issued with an invoice that states what they owe. Thus payment is made. A sample invoice doc is shown below.
INVOICE
__________________________________
__________________________________
__________________________________
VAT NO __________________________________
PIN NO __________________________________
INVOICE No. __________________________________
Date __________________________________
ATTN: __________________________________
__________________________________
__________________________________
__________________________________
CODE DESCRIPTION QTY UNIT PRICE VAT UNIT TOTAL AMOUNT
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
____ _________________ ____ _________ ____ _________ ________
Total Amount_________________
Terms: __________________________________
Received By: __________________________________