I am confused on how to handle sales orders that are picked up and paid for in our store via POS. Currently, if a sales order is created with a delivery address to "store pickup", it triggers a PO, if necessary, and a delivery order. When the customer comes in to pickup their order and pay, the delivery order is then automatically marked as "cancelled". We want to differentiate delivery orders that were truly cancelled vs those that were picked up by the customer. How can we handle this?