Using google wallet, consumers can pay for goods in stores. at check out, mobile users simply pass or tap their phone on a merchant terminal and payment is transferred. users receive an sms text message confirmation. the google wallet and similar payment systems are based on technology.

NFC technology

Explanation:

NFC stands for near-field communication , which consist of a set of protocols that allows two devices to exchange information.

In the examples above, the flow of information occurred from the phone (which contains the data regarding how much money you put in) and the terminal (which contains data regarding product price). By tapping the phone, the consumers initiate the exchange of information and the balance in the phone will be automatically deducted by the price in the terminal.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.