Litre count
Milk is counted in litres at the door, with the cart named on the slip.
Slip lines
Litres, shortfalls and returns, line by line.
Chai carts in Kolkata and Howrah buy milk, tea and sugar from a few wholesalers each morning. We record each delivery's quantities, the cart and the signature, so a short delivery is settled on the same slip.
Short line
A shortfall is written with its amount and is settled on the next delivery.
Return line
Spoiled or returned milk is written with the reason and the credit.