Version 1.1:
- More companies were added to receive and send cargo: it was 4, it was 15.

Arranged the origins and destinations as suggested by all.
The resulting job list was a bit short, so there's also gravel & calcareous in addition to the carbon cargo.
I couldn't solve some problems.
Only for the trailer purchased.
The trailer itself is available in 3 sizes and a painful chassis.
*Required game version is 1.39!