TimeTrex Time and Attendance

Can someone explain how the system of the Contributing Shifts works? Or where i
It seems to be quite crucial but guide describe it poorly.

thanks

What part of the Administrator Guide do you need assistance with?

Need to help from "math" point of view.
It seem to be container of containers which sums the events in them - em I right?

Perhaps it would be best if you could describe in detail, specifically what you are trying to achieve and we can help you do that.

Now it works as we needs, but I want just clear out how the Contributing policy works, because I found out that in "reverse" way and I may be wrong.
This may also save lot of time of others who will read this.
Phrase "Contributing Policy" was bit mystery for me for a while and even native speaker doesn't help much .

In our case we got couple Contributing policies which are linked up to "standart" policies.
Each policy is linked to group of Pay codes so in TimeSheet overview it starts sums them together.
So this is way how to adjust figures in TimeSheet (Accumulated Time section)?

thanks
petr