Anew pair of shoes costs $50. in this case, money is a medium of exchange, store of value, unit of account?

There are four main functions of money. Money can function as a medium of exchange, as a store of value and as a unit of account. Money functions as a medium of exchange when it is used to aid the exchange of services or goods. It acts as a store value when money can is able to store, save and retrieve. Lastly, when money is used as a standard measurement of the value of the goods and services, it functions as a unit of account. In this case, money functions as a unit of account since the statement only signifies the worth of the shoes.