The purpose of offer (POS) or purpose of procurement (POP) is the time and place where a retail exchange is finished. At the purpose of offer, the trader ascertains the sum owed by the client, demonstrates that sum, may set up a receipt for the client (which might be a money enroll printout), and shows the alternatives for the client to make instalment. It is additionally the time when a client makes an installment to the shipper in return for merchandise or after arrangement of an administration. In the wake of getting installment, the trader may issue a receipt for the exchange, which is generally printed yet is progressively being abstained from or.