UK VAT Question/ Amazon Seller Calculator Issue?

Hello All.

New to the FBA space and just registered my Ltd company in the UK. Currently not VAT registered. My question is in relation to VAT as a whole but more specifically the Amazon Calculator. As a Non-registered VAT seller, do I have to pay VAT on Fees ie the Amazon Fees + Fulfillment Cost?

In the picture example , I get charged 20% VAT however I’m unsure what this is for?

My apologies if this is a stupid question, seem to be getting conflicting answers. Any help is much appreciated!