Juan pays 4*7 = <<4*7=28>>28 dollars for all four tire repairs.

Juan pays 0.50*4 = <<0.50*4=2>>2 dollars in sales tax for all four tire repairs.

Juan pays a total of 28+2 = <<28+2=30>>30 dollars.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tire repair for each tire costs $7, plus another 50 cents for sales tax. If Juan needs all 4 tires repaired, how much is the final cost?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
30
Tire repair for each tire costs $7, plus another 50 cents for sales tax. If Juan needs all 4 tires repaired, how much is the final cost?
train