First find the total cost of the accident: $40,000 + $70,000 = $<<40000+70000=110000>>110,000

Then multiply the total cost by the percentage Carl has to pay to find his personal cost: $110,000 * .2 = $<<110000*.2=22000>>22,000

# Answer

22000
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Carl caused a car accident that resulted in $40,000 worth of property damage and $70,000 worth of medical bills. If Carl's insurance company will pay 80% of the costs, leaving Carl to pay the remaining 20%, how much does Carl personally owe?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
22000
Carl caused a car accident that resulted in $40,000 worth of property damage and $70,000 worth of medical bills. If Carl's insurance company will pay 80% of the costs, leaving Carl to pay the remaining 20%, how much does Carl personally owe?
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