How to setup Safety Stock?

Hi

I have this horizontal plan in ASCP Constrained Plan.

Based on this doc (Doc ID 376451.1) the safety stock calculation is Safety Stock (Day X) = Sum of all demands for that Item for "Bucket Days" number of working days from Day X * Percent / (100*Bucket Days)

My expected result:

sum of all demands for that items for 30 working days from 16 Jul 2025 = 371+370+370+371+370+371+370+370+371+370 = 3704

percent in master item = 1700

Bucket days = 30

safety stock = 3704*1700/(100*30) = 2098.933

I stuck to find where 4828 safety stock is come from. I have create SR, he tell me to read the doc. But that is what I found.

Thank you

Aji