There is a total maximum supply of 100,000,00 (100 million) PLEX tokens.
And what is the circulating supply?
The current circulating supply is 50,016,422 PLEX.
What is the price per token during the pre-sale and ICO?
Why do you say ICO? There is a difference between coin and a token.
Is it? I thought both are used interchangeably.
NO. refer to this. A coin operates independently, while a token depends upon another cryptocurrency as a platform to operate. So plex is a token as it will operate on Eth platform.