Investigating storage fees reveals issues with UK/EU's system of combining shipments. Additionally, the overlooked Storage Utilization Fee on Amazon adds to the complexity, making it challenging to avoid losses.
Digging into storage fees today. Seems like the UK/EU has a system problem mixing shipments together. But also noticed / remembered the Storage Utilization Fee. I totally forgot about this fee. Amazon is really getting crazy with all this, you need a PhD to not lose money..