Economics 19th Edition by Stanley Brue, Cambell McConnell, Campbell McConnell, Sean Masaki Flynn, Sean Flynn

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If in some country personal consumption expenditures in a specific year are $50 billion, purchases of stocks and bonds are $30 billion, net exports are -$10 billion,' government purchases are $20 billion, sales of secondhand items are $8 billion, and gross investment is $25 billion, what is the country's GDP for the year