Final answer:
The other main ways to pay in a shop include using a debit card, credit card, or mobile payment apps. Credit card payments involve borrowing money that must be repaid later, and technology has also introduced virtual currencies as payment methods.
Step-by-step explanation:
The other main way to pay in a shop besides cash is by using a debit card, credit card, or via mobile payment apps. Debit and credit cards are forms of electronic payment that allow consumers to make transactions using money stored in bank accounts (debit cards) or borrow money from the card issuer up to a certain credit limit (credit cards) which is repaid later. The use of credit cards is, in essence, spending M1 funds from the account of the credit card company, which the cardholder will have to repay when the billing statement is received. Moreover, advancements in technology have given rise to mobile payment apps and even virtual currencies like bitcoin, which further expand the methods of payment available in shops.