It gets more complicated. In BA-MA Freiburg RL2 III/734 units are given a six-figure strength return e.g. for
Sonderstaffel Einhorn on 7 November 1944 you get:
14 Fw 190 F-8 x 13 x 9 x 9 x 7 x 0
I read the first three as an establishment (Sollstarke) of 14 Fw 190; actual strength (Iststarke) of 13; and serviceable stength (Einsatzbereitschaft) of 9.
If the last three numbers are crews, then the categories may be the same as for the aircraft.
I didn't see a definite explanation on the file so maybe it was just one those things that everyone understood at the time.