A plant with installed capacity of at least 200 tonnes is called a large plant.
Installed capacity is greater than 200 tonnes for plant number 1, 4, 8, and 9.
The remaining plant numbers i.e. 2, 3, 5, 6, and 7 are small plants.
Thus the difference between the total production of large plants and small plants, in tonnes is
= (160+190+230+190) - (150+160+120+100+120)