Using customer fields values in the worklist

Hello,

In transaction CAT2 I need to add two additional fields, values of which I want to use in the calculation of the worklist.

The values of these fields need to be multiplied, divided by the number of days in a month, and spreaded into the date list (DAY1 - 30).

They are zero in this screenshot:

Is it possible to change values of these dates in the time sheet at all?

First, I added two fields on the customer subscreen, using CATS0007 enhancement.

Then, I added customer fields into the CI_CATSDB structure, assigned to the CATS_ADDFI fields respectfully, using CATS0005.

But, I don't know how to connect these two enhancements.

Actually, I don't exactly know, if I needed to add these fields in CI_CATSDB structure, since I don't use them for other purposes, except for this calculation.

Maybe I should use memory to pass the values?

Any help will be appreciated.