Shipping Costs Not Displayed on Generated Download Report

[skidd-marks-automotive]

When downloading a report of multiple sold listings for tax purposes, why isn't shipping cost included?

I do see there is a column for shipping cost in the report but all rows are filled with $0.

I do free shipping for all of my items, so maybe that's why?? So is there another way that we can get bulk costs for shipping broken down per item, without having to click on each item transaction to find that info?

Thanks in advance