When creating an FBA shipment and selecting the no-fee 5-shipment plan, Goflow should automatically divide the quantity of every SKU evenly across the 5 boxes in Pack & Ship. For example, 160 units would become 32 per box, 50 units would become 10 per box, and 10 units would become 2 per box. This would eliminate the need to manually calculate the per-box quantity for every SKU and then enter the same breakdown across all 5 boxes. If the quantities cannot be divided evenly across all 5 boxes, Goflow could simply show that the automatic split option is not available for that shipment.