Ability to subtract the count of an event from the count of another event

I’m new to Heap and reporting, so wondering if the below is possible.

Id like the ability to count the number of active templates my users have on our platform.

I currently have 2 events going into Heap:

• Template created
• Template removed

I am able to work out how many active templates exist by subtracting the events from each other:

<template created> minus <template removed>

I want to know whether it is possible to draw up a chart in Heap in this way? I’d then like the ability to group by user, to show how many active templates (on average) each user has.

Is this possible? Thanks