If Stacy buys 3 pairs of shorts individually, the total cost would be 3 * $10 = $30.
But if she buys 3 pairs at once, she can get a 10% discount on the total cost, which is 10/100 * $30 = $3.
Therefore, she can save $3 by buying 3 pairs at once.
#### 3
The answer is: 3
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Stacy went to a store to buy some pairs of shorts. Each pair normally cost $10, but there's a discount of 10% on the total cost for people who purchase 3 or more pairs at once. How much can she save by buying 3 pairs at once as opposed to purchasing them individually at different times?

### Answer:
