Without factoring in the cost of depreciation for his car John made $30,000 doing Uber. When he finally traded in the car he bought for $18,000 he got $6000 back. What was his profit from driving Uber? Let's think first. Chain of thought:
His car depreciated 18000 - 6000 = $12000. So he made a profit of 30000 - 12000 = $18000.
Therefore, the answer is 18000.