The traveller fee for Pre-orders is tiered according the the total price per order in your Pre-order.
The service fee charged will be based on the total value of each order by requesters, regardless of the number of items purchased, or the individual prices of each item.
For example, if a requester purchases 2 items, priced at $80 and $30, the total checkout value of both items will be $110. You will, therefore, be charged 4% +$0.50 as the service fee for this order.
This fee will be charged as a deduction from your payout.