A seedling nursery's stock is different every week. Trays come ready in batches, a variety sells out on a Tuesday, and the answer to “do you have tomato seedlings” changes faster than any printed price list can keep up with — so customers ring, and somebody walks out to the tunnels to look.
So the stock count is the product. Every variety carries a live number, the catalogue is searchable by what is actually ready today, and an order is reserved online and paid with Airtel Money or MTN MoMo, for collection at the nursery or delivery across Lusaka.
It is shown here as a demonstration and says so on every screen that touches money: the prices and stock levels are invented, and no payment is taken. That honesty is the point — the catalogue, the categories and the brand are data, so skinning it for a real nursery is an afternoon of typing rather than a rebuild.