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Kansas farmers sell $1,500 of wheat to food processors. Processors sell $3,500 of flour to bakers. Bakers use the flour to produce $5,500 bread and sell it to consumers. Additionally, U.S. car makers import $17,500 of steel from China and produce cars. $12,500 of cars are sold to Uber and $16,000 of cars are sold to U.S. consumers. What is the GDP of the U.S. in 2018?