That is not a 'shroom'. That is a fly agaric mushroom. The dose is three large mushrooms. Too, much will kill you. They have to be dried to convert the chemical from one that makes your face flush to one that gives you a lame sleepy crappy high.
$90. That's crazy. It's leagal as a beagle. You can buy them online and get an oz. for like $20. Not worth a shit, though. I don't think they are healthy, but I know you can O. D. On real shrooms you trip and you'd throw all the shrooms up before you O. D.
You got jipped!