In accordance with the normally accepted commercial practice, there are two types of plastic live chicken transport boxes: (7 kg) and (8kg). Recently, two new boxes have been imported into the market and they weigh (6kg) and (7,200kg). However, traders deal with the latter boxes as the former. This caused loss to poultry farmers and breeders, in addition to fraud (tampering with the weighing scales), which is forbidden in Sharia. Because of this disparity, the marketer managed to make a great deal of profit. What is the ruling of Sharia on this knowing that the farmers take out one kilo from the weight of every basket against chicken runoff?