here’s a fun one on a Friday. If I use FIFO, and therefore have multiple FIFO layers for a given product (assume for funzies that every time I buy it the cost swings dramatically), then create a transfer order for that item with a quantity that crosses multiple FIFO layers, does NS MAINTAIN the FIFO layers for costing when I receive the product into the destination? Or does it just wash it all out as a receipt on date {today} for value as set in {transfer price}?

Cost is calculated at the Location level, so your cost layer from Location A is decremented and Location B's cost layer is incremented via Item Fulfillment and Item Receipt (Location B cost layer will reflect the IR transaction date).

Okay, so based on the accounting preference the cost is either the transfer price or the original receipt price based on FIFO, but the action of receiving an inventory transfer order creates a NEW FIFO layer at that amount dated today? Do I have that right?

I havent seen this exact scenario but from what I can tell, the receiving location is going to average out the cost if you shipped/received all 17 units together in this example. The IR essentially treats the single line as as Amount / Quantity rather than respecting the originating Location's cost layers