This search can get you most of what you seek, except for number of events.
index=_internal source="*license_usage.log" sourcetype=splunkd
| stats sum(b) as Bytes by h,s,st,idx
| eval MB=round(Bytes/1024/1024,3)
| rename h as Host, s as Source, st as Sourcetype, idx as Index, MB as "License Used in MB"
| table Host, Source, Sourcetype, Index, "License Used in MB"
--- If this reply helps you, an upvote would be appreciated.
I don't have an actual search to provide but rather an app that we use in our environment that is immensely helpful when it comes to license usage. We use Meta Woot! a free Splunk app to provide almost exactly the information you need.
It has a dashboard called Meta Woot! License Event Usage that details the host, sourcetype, index, total_events, license_per_event, and total_license usage.
I would recommend check this app out as it does an amazing job of providing the license usage tracking metrics you might need