Sandstone from local quarries
The red sandstone quarried around Bharatpur is sold by the square foot for slabs and by weight or piece for blocks, with a wastage allowance the trade works to. Holding the unit and conversion on the item removes the arithmetic, and showing wastage as its own line settles the argument.
A border district trades both ways
Supply crosses into Uttar Pradesh routinely, changing the tax treatment to IGST. That switches automatically from the buyer's state on the party, with the e-way bill details already captured on the delivery record.
Agricultural income behind the building
The district builds on farm money which concentrates demand after the crop. Last year's movement over the same weeks is the honest basis for the pre-season order, which cannot be corrected once the season starts.