A southern distribution centre
A meaningful share of the trade goes outward to shops and contractors across the southern districts rather than over a counter. That means agreed rates per buyer, credit terms that differ by customer, and despatch records with vehicle details — the party list takes longer to set up than the item list and returns more.
House construction credit
The retail side is largely individual house building over months, producing many modest credit accounts rather than a few large ones. It is the count that defeats a register, and each party having its own ledger updating from the billing is what makes it workable at all.
Deliveries across a spread catchment
Loads leave for towns an hour or two away on hired vehicles to buyers seen occasionally. Vehicle, date, destination and receiver on the challan, held against the party, is what settles a question weeks later without either side relying on memory.
Formal buyers expect formal bills
Tamil Nadu buyers tend to be GST-conscious and a properly formatted invoice with HSN codes and line-wise tax is expected rather than requested. Because the rate and code sit on the item, that happens automatically rather than depending on whoever is at the counter.