You sell apples but want to buy shoes. How does money help you make the exchange?
Correct answer
Answer B: You sell the apples and use the money you receive to pay for the shoes.
Quick explanation
In a direct exchange, what each person wants must match what the other offers. Money connects two separate transactions: selling something and buying something else later.
Detailed explanation
In barter, two wants must coincide at the same time: you must offer exactly what the other person wants, and they must have exactly what you are looking for. Economists call this the double coincidence of wants. Barter can work in a small group. In an economy with a division of labor and many people, goods and services, however, it quickly becomes impractical.
Money solves this coordination problem by acting as a generally accepted intermediary. You can sell your work for money and later use that money to buy something completely different from someone else. The sale and purchase therefore need not involve the same person or happen at the same time. Money does not solve every economic problem or automatically determine fair prices. But it reduces the effort of finding suitable trading partners and makes specialization, trade and economic planning easier.
Example or everyday application
An electrician repairs the lighting in a bakery. Without money, the baker would have to offer exactly something the electrician currently needs. With money, he pays the bill; the electrician can later use the amount for rent, food or tools.
Key takeaway
Money separates selling your work from making a later purchase.