Hi ...
I'm confused with the 90/180 day rule when it is being checked between 2 visas

Short Term Business Visa issued by Germany:I have stayed in Germany from 6th Feb 2017 to 16 Feb 2017 (11 days) and then from 27 Feb 2017 to 17 Mar 2017 (19 days) - 2 visas where both were for single entry & duration of stay have expired
Short Term Business Visa issued by France: This is valid for 90 days over a 2 year period from 24th Mar 2017 with multiple entry. I'm staying in France from 29th Mar 2017 and planning to stay until the 23rd June 2017 (87 days).
On 23rd June 2017, the corresponding 180 day period would be 25th Dec 2016 to 23rd June 2017.
My Question to this forum is:
1. Does the stay in previous Visa count for 90/180 day rule?
2. If yes, By what date should I be leaving the schengen state without violating the 90/180 day rule
3. If no, is there any reference that i can use
Would also appreciate if anybody could redirect me to a similar thread, if any.