Isn't 5,000–6,000 won for a bottle of Soju a bit excessive?

If you want to make a profit, you should do it through the side dishes.
It's fine to charge 10,000 or 20,000 won for a meal or side dish made from ingredients, even if the ingredient cost is only 1,000 won.
But selling Soju and beer that are just bought by the box feels like they are taking too much profit...
Is it the refrigeration cost?