As far as i know, that will need around 20k or more as the listing fees and this is only applicable for the low tier exchange site like hotbit, hitbtc. Mercatox charges fewer fees than it consider this is the lowest tier of exchange site with a very small daily trade volume.
The major exchange site like okex and kucoin never try to disclose the listing fees and you can try to contact their support directly. I saw exchange sites were publishing how many listing fees.
Is not it better if you can join an official telegroup and ask admin directly about that.
Yeah i asked that in their telegram group but they said to contact Support center, even i contact the support center then they asked to fill a document.. so its take lot of time to choose a suitable exchange for the project with the allocated funds for listing