Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
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?

### Response:
All four tire repairs cost $7 x 4 = $<<7*4=28>>28.
Sales tax for all four tires costs 0.50 x 4 = $<<0.50*4=2>>2.
The total cost for all four tire repairs is $28 + $2 = $<<28+2=30>>30.
#### 30