Interesting mathematics back there, Siren.
A,
Evolis sales: unstated variable from 0 upwards
B.
Number of years: stated as multi, possibly 2 to 10
C'
Number of Pharmacies: 1800, going from 0 to 1800 non linear over time (B) whatever that may be
Giving a definite precise answer of 92.
Care to elaborate?
Take your time.