Granite by area, weight and lot
Stone here is quoted by the square foot for slabs, by the cubic foot for blocks and sometimes by weight, often to the same buyer with a wastage allowance on top. Holding the unit and conversion against each item removes the arithmetic, and showing wastage as its own line settles the argument before it starts.
Matching a shade months after the first sale
A buyer who did the flooring last season comes back for one more room and expects the stone to match, but two blocks cut from different lots will not. What answers it is the sale record itself: if the original invoice names the lot, you know what to look for in the yard, and if that lot is finished you can say so plainly instead of sending something close and arguing about it later.
Aquaculture and farm-linked demand
Pond construction, farm building and processing units bring a demand that follows agricultural and aquaculture cycles rather than a steady urban pattern. Movement over the same weeks last year is what the stocking decision should rest on, because the peaks are predictable but not evenly spread.
Credit that settles with the crop
Farm and aquaculture money arrives in cycles, so settlement clusters and your exposure peaks predictably. Ageing rather than a total tells you where you stand before the season, and a limit per party keeps any one account within reach.