Checking the shipping costs on all of our orders of the past few week

Hi All, I am a Magento noob. We have had a big sale with Affiliates through Rakuten and I need to check that we haven’t applied the discount to the shipping and hence overpaying our affiliates. When I export the data from orders as a CSV it doesn’t include the field for shipping costs. Is there a way that I can add this field to the report?

Currently, I am manually clicking through thousands of orders to see if we charged shipping or not.