When you compare prices for high definition televisions at various stores, you are using money as a(n)medium of exchange. standard of value. store of value. payment method. unit of currency.

standard of value

Explanation:

The standard of the value permits all types of merchants and the economic entities to set the fix price for the goods and services in order to stable the economy

So as per the given situation since it is mentioned that in the case when you do the comparision for HD television so you are using the money via standard of value

So the same is relevant

answer; whoever is willing and able to pay the price;