Reporting on Customer Orders data is possible but as of writing is still being worked out.
The asumption here is that you want to track “sales” which are attributable to Customer Orders.
The “easiest” way, though potentially inaccurate, is simply to query the Customer Orders data and assume that if a given Order’s “status” reflects that e.g. it has been paid for, then include it in the report.
On the other hand the precise amount paid by the customer may or may not even be in the Customer Order data. Even if it is there, is it correct, or was it just an “estimate” and really a related POS Transaction must be consulted for the true price.
However the Order status likely is important on some level, to detect cancellations etc. Presumably if a refund is given, the POS Transaction would have that amount, but there likely is nothing to tie that back to the particular Order which was canceled.
So at the moment the focus is on recording “links” between a given Customer Order and POS Transaction. This is done by way of a Trainwreck DB (see also Importing):
A transaction is imported to Trainwreck as per usual, but in addition to the normal stuff, the transaction is inspected for any “indicators” of Customer Orders. (Often the cashier scans or enters some ID for the Order when ringing it up.) Such indicators are then stored in a dedicated place within Trainwreck. This takes care of the “high level” meaning we now have links between a POS Transaction and Customer Order.
But really, a POS Transaction has “line items” and so does a Customer Order. So we actually need a link between the relevant line items.
The line item links are established in a second phase. So the first phase is focused on importing POS Transaction data, and we’ve done that. But now Trainwreck has all those line items and so the item-level reconciliation can be done “natively”. Again we already have the high-level links, so we fetch a linked pair (Transaction and Order) and then crawl each to identify item-level links, and record any which are found.
Once that is complete, a Customer Orders report can more easily obtain accurate payment amounts from the POS Transaction data (although it reads from Trainwreck instead for convenience). And of course it can still leverage the Customer Order status etc. as needed.