CSO return shipping charge

[CTSVOWNER]

I check inventory for parts sitting on the shelf more than 11 months but less than 12. Then I go to the shelf and check the tag if they are RIM, CSO, DRO, or QPO. If they are CSO I check why they were not installed. I let service, bodyshop, or sales know I am charging them 35% restocking fee. So I apply for the CSO return. (usually 3-8 pieces)[is that normal or more than average?]
One of the pieces is a $2.07 part. By itself not really worth sending back but in the group I'll add it. In comes the paperwork and all is fine. They usually break it down as to scrap, local warehouse or back to CCRC 624. The $2.07 piece is slated for CCRC 624. Subtract the 35% fee -$0.72 and were down to getting back $1.35. Nowhere did it list a shipping charge. Today I check the invoices and BAM I see they charged me a shipping fee of $4.00
I did not see any shipping charges listed so I figured I was good. Going forward what is the best way to see if I am actually going to be charged shipping?

Thanks Dave

[CTSVOWNER]

Some items I have shipped back they listed a HNDLG FEE $100.00 and actual charge was $33.13 (local warehouse)
Other items list a HNDLG FEE and I do not get charged anything. I cannot figure out why I get charged one item and not others.

[Whiner]

The handling fee was formerly called repackage fee. Back in the day they would actually re-box parts when the box was damaged. Dealer had to select (accept) the fee otherwise the damaged package would be returned freight collect.

The $4.00 freight is the minimum charged on any monthly return - per section, except for field scrap. Once the $4.00 is exceeded then it becomes a percentage of dealer cost. If memory serves it is 3% or maybe 4%.

Either way if it is a cheap, single part - keep it or scrap it. Freight is expensive.