The following economic data are known:

GDP of a country $ 3000

Net foreign income $ 100

$ 150 depreciation

$ 120 indirect tax

$ 40 corporate income tax

Retained earnings $ 110

$ 20 insurance fee

Transfer payment $ 30

$ 70 Direct Tax

Count:

a. National Income (NI)

b. Personal Income (PI)

c. Disposable Income (DI)