Poultry farms build continuously
Sheds, feed stores and worker housing are built and extended year round rather than seasonally, using structural steel, roofing sheet and cement in predictable quantities. That produces steady repeat buyers whose next order looks much like the last, which makes repeating a party's previous order faster than building a new bill.
Lorry body building and its material
The transport industry here buys sheet, sections, fasteners and fittings to production schedules, by weight and by specification. Each size as its own item is what keeps stock meaningful and stops a heavier section being billed at a lighter one's rate.
Running accounts with units
Both farms and body builders buy frequently and settle on their own cycles, producing accounts that grow quietly between settlements. A limit set in advance and a monthly statement are what keep those inside what the shop can carry.