Office supplies are rarely noticed until they run out - and when they do, it usually means urgent orders, disrupted workflows, and unnecessary pressure on both sides of the supply chain. ExtraLux, a Slovenian B2B office supply retailer, saw this as a problem worth solving. Their idea was to move away from the reactive reorder model and instead keep optimized inventory directly at customer locations, replenishing it regularly and charging only for what was actually used. But making that work required more than a standard B2B webshop - the platform had to track inventory, handle monthly consumption reporting, and automate invoicing, all while still supporting traditional purchasing flows for customers who needed them.