21.
Profit is maximum when

22.
Excise tax is a part of

23.
Unemployment due to mechanization of agriculture is

24.
The labour force participation rate is the

25.
At the point of equilibrium of firm (under perfect competition)

26.
The shape of rectangular hyperbola is made by

27.
Unemployment of labour means that

28.
The human effort applied to the production of goods is called in economics

29.
Normal profit is

30.
As output increases