Google Maps Cost

I am trying to decide if new functionality in my app will cost me more for access to my google maps API. I will still show the same map it is just the map will have a huge amount more markers. The map has a workflow for when a marker is clicked. I’ve read the maps platform pricing sheet https://cloud.google.com/maps-platform/pricing/sheet/ and assocated links but do not understand how this relates to the maps and assocated map markers in my app.

If anyone can enlighten me it would be appreciated. Thanks