Each box includes a fulfillment credit that is specific to each box type (https://www.forever.com/services).
If you put more than what is covered by the fulfillment credit, that is considered overages. Overages are billed at an a la carte price and will require additional payment.
You can reference our pricing sheet to view our a la carte pricing and get an idea of what the additional cost would be - CLICK HERE.
If you have any further questions please call 412-904-6859 or e-mail us at email@example.com and we will be happy to assist you further.