What are the $2.50 charge and the 18% fee on the invoice I received?

All orders will incur a $2.50 auction item fee for each individual lot, along with an 18% buyer's premium fee, which is based on the bidding price of the items.

Please see information regarding payment and taxes below.

https://megasaversauction.com/lots/view/4-DIWA92/payment-taxes