There was nothing limited about our bombing campaign against ISIS. It included nearly every platform in the US Air Force and CIA, Air Force, and Army Drones. I’m confident that you could find out a rough estimate of ordnance dropped if you’re truly interested. The AC-130s and A-10s alone were significant.
There’s this website counting them - https://airwars.org/ - and they say 107,129 bombs and missiles (Syria and Iraq both) from America and allies. The website itself seems to be a bit leftist, but I think the number might be right.
Been away...
My use of “limited”, was referring to our attack on Assad for using the chemical weapons, not our decimation of ISIS.