Can Hibou invent a price?
No. Hibou does not invent an order total. When the store's pricing rules can price the order, that total is what the agent says. When they cannot, the agent may state a unit price and must not multiply it, add shipping, or announce a total.
From the THREADLY deployment
THREADLY's prices live in its catalog and pricing rules. They are THREADLY's product prices, not a fee for Hibou. This website does not list those product prices, because a quoted number here would go stale.