You've got 460 kilos of barley but someone only wants to buy that in units of ozs, to change the units multiply by 35.27397. Now you have 16226.03 ozs.

To convert 570 kilos into ozs multiply by 35.27397 giving 20106.16 ozs.

In 640 kilos of wheat there are 22575.34 ozs, to achieve this take 640 and just multiply by 35.27397.