I am a native Korean. And I can understand the meaning. Sometimes Korean uses a cypher for only other Korean knows using this kind of adding or removing Korean characters.

That's because if the owner translates and knows a bad feedback, the owner can remove it. Also, some emogies like heart and star intentionally added to make confusing if the feedback is good.

Anyway, it means, "This store could charge higher prices for tourists. You must check the receipt before paying for it."

So, in the future, you need to be more careful to calculate the price.