What is the order by which COGS is calculated in Skubana?

The order of calculation is as follows:

1. First In/First Out (FIFO) value from POs
2. If there is no FIFO, Skubana looks for vendor products.
3. If there aren't any vendor products, Skubana looks for Vendor Cost in the product.
4. If there is no Vendor Cost in the product, COGS is 0.