Forex trading store

i do not really understand these calculations…please help…
depreciation=115
corporate profits=171
wages=1360
exports=143
government expenditures=458
imports=157
indirect business taxes=381
net domestic product=2311
consumption expenditures=1387
personal income taxes=402
disposable income=1592

i would appreciate your help…i have to practice for my exam so i would like to make sure i'm taking the right steps..thanks

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