A hundred of Multiplayer Each day with Server Cost?

Hello Guys.

I try to figure out how much Multiplayer Server cost.

  1. Maybe 0~ 100 of people each day, are supposed to play.

  2. Developing with Html5(UE4 4.23ver) or Packging Files

  3. The Game Genre is kinds of Online Gallery. People can watch the Videos, create review of them, and travel Art Levels.

that’s it… All ref is focused to Unity 3D
I can’t research Server cost any of this. I just know need to use AWS EC2.

Can you tell me Any Advises? or Ref?

How much Should i pay Server cost monthly?

Is there some different cost between html5 and Packaging Files?