Kautilya's Arthashastra 3.12.26

3.12.26

deśakālātipātane vā parihīṇaṃ sampradānakālikenārgheṇa mūlyam udayaṃ ca dadyuḥ //

Retail dealers, selling the merchandise of others at prices prevailing at particular localities and times shall hand over to the wholesale dealers as much of the sale proceeds and profit as is realised by them. The rules regarding pledges shall also apply here. If owing to distance in time or place there occurs any fall in the value of the merchandise, the retail dealers shall pay the value and profit at that rate which obtained when they received the merchandise.