Trying to figure out S3 Billing

According to the documentation, S3 cost is calculated pro-rated charge equal to the storage charge for the remaining days of the standard tier. https://aws.amazon.com/s3/pricing/

I figured it out. It has been a busy summer... All data has been there for at least 90 days...

It turns out that I had versioning turned on, and there was a bunch of files still set up as standard. these would not show up unless I clicked the show versions button

As this was ultimately a test... I simply cleated the S3 completely and started over.