Channels: fees, shipping assumptions, and the preferred channel

Each channel models where you sell. Its fields drive every pricing calculation:

• Marketplace fee % — the platform's cut (eBay final value fee, TCGplayer marketplace fee).
• Payment fee % + fixed — payment processing (e.g. 2.9% + $0.30).
• Fee on shipping? — whether percentage fees also apply to shipping you charge the buyer (eBay: yes).
• Shipping (derived) — what the buyer pays you and what labels cost you are averaged from your recent orders on that channel, not typed in; the shipping-labels import (Import tab) keeps the cost side actual. New channels use seed values until orders exist.

Drag channels to reorder. The top channel is your preferred channel — its break-even and target prices show by default in the inventory table ("Show all channels" reveals the rest).