Yes, in case you missed it, the Rollei part A+B+C color developer must be premixed according to the instructions before you use it.
Originally Posted by jjbonbon
It is intended to be reused. I don't know the recommendations on the sheet but many people report getting 20 rolls developed from 1 liter of Rollei developer (YMMV)
So, after mixing everything according to the instructions you should have 4 bottles. Color Developer, Bleach, Fix, Stabilizer. Return each to their container after use.
The only functional difference between black and white and this C41 kit is the extra bleaching step. (temperature is also important)