We recommend that you first check your online customer account, as you will find an overview of your parcel, item by item.
The total cost of your package may increase/decrease due to the inclusion of extra items (a binder or special item) or exclusion (due to out of stock).
Also, it is important to keep in mind that the price per package may increase depending on the shipment you are planning. We also recommend that you take a look at the "Your subscription in detail" section on the main page of your collection, which you can find:
Find your collection and scroll down to that section, where you will find a complete overview of the costs per package.
Billing and credits