What sign indicates the cost of the service, which can vary?

Question

Fintech

Explanation, there is a targeting service of digging, its cost varies both up and down
. How would this business be marked with a sign?

Answer 1

≈ if the range is not clearly known, but the run-up is not very large.
X - Y if the range is known in advance.
Well, if you answer in essence, then you should not try to hide such an important thing as the changing cost of the service behind one sign - this is a recipe for getting a huge amount of negativity from customers. You need to clearly show the client that pricing is complex and show how it happens and how the client can control it.