Ask how much something costs
いくら asks how much something costs.
JLPTN5
... は いくら ですか~ wa ikura desu ka
How much is [thing]?
Example Sentences

How much is this?

What is the price?
Use いくら to ask what something costs. Name the item first with the topic marker は (pronounced wa), then ask いくらですか. いくら can ask about quantity too, but price is what you will use it for.
Tips and Common Traps
Hana· Key point
いくらですか is the go-to phrase at any shop, market, or food stall in Japan — short, clear, and polite.