When to use them and what do they mean
A Purchase order is used to generate an ongoing/standing add-on order for billing purposes, i.e. eggs every other week indefinitely. For seasonal CSAs, POs can be used to bill add-ons per delivery. If the subscriptions are recurring/per delivery billing, you must use POs to allow for standing orders. This setting is in the product set up. If you wish to collect payment for a full season’s worth of add-ons at once, at order time, check the box next to Always bill at time of order (NO Purchase Orders on this item).
A product with a frequency of Single Delivery only will not use POs.
All POs bill at order deadline, although they are included in the counts as per the Harvest and Pack the Truck reports. To view orders generated as POs, see the brown side bar menu in Orders. Note, the total value of a PO is shown in a light grey color, meaning the PO is active but has not billed yet. When a PO bills, the dollar amount is in black type.