How to find the difference of two metric aggregations in kibana

Elastic Stack Kibana
1

If I have metric C which is the sum of metric A and metric B.
I created metric C with search query "id1:0210" and give the total of 42,187
I created metric A with search query "id1:0200" and give the total of 35,343
How do I produce metric B, which is C - A, in Kibana metric visualization (give total 6844) ?
What operator should I use specifically?

Screenshot1.png1366×768 154 KB
Screenshot2.png1366×768 167 KB

2

You can't do this unfortunately.