Brand new backpack. He compares a price of three different backpacks at a local store to find the best deal. Which purpose of money is Brian demonstrating

This is social studies?

The purpose of money that Brian is demonstrating is "comparing value." By comparing the prices of three different backpacks, Brian is trying to determine which one offers the best deal in terms of price and quality.

The purpose of money that Brian is demonstrating is "unit of account."

By comparing the prices of three different backpacks at a local store, Brian is using money as a unit of account to evaluate the relative value or cost of each backpack. Money serves as a common measure or unit in which prices are expressed, making it easier for Brian to compare and assess the different backpack options based on their prices.