Because the deposit is net of things the order never mentioned: commission, fulfilment fees, advertising, returns processed after the sale, and adjustments from a previous period. One deposit can span three weeks of activity.
So the reconciliation is done by hand, or not done, and reported margin is gross of deductions that materially change it.
The payout is reconciled to the transactions inside it — sales, fees, refunds and adjustments — rather than to an order total, so the bank line clears against real components.
Returns post as credit notes against the original sale, restoring stock and reversing the cost of sale, so margin corrects itself rather than being adjusted later.
It is not a storefront or an order management system, and it does not connect to marketplaces out of the box — orders and payouts arrive through the API.
And it will not recover a fee you were charged wrongly. It will show you the fee, itemised, which is the prerequisite.
Cost of goods, marketplace fees and shipping are all deductions on the same ledger, so contribution per channel is a query. A channel that looks profitable on revenue and is not on contribution becomes visible in the month.
Multi-currency holds the rate on the day, and inventory across warehouses posts as movements happen.
Yes, to the fees, refunds and adjustments inside them rather than to order totals.
Yes — credit notes reverse the sale and the cost of sale, and restore stock.
Yes, after fees and shipping, on the same ledger.
Half an hour on your own numbers is usually enough to say whether Books is the right place to start.