It'd be $8.52 in 2015 dollars, but certainly they are the ones who mentioned the $12 amount not you, so I'll put that aside.

Far more importantly, you would not get billed for 2 minutes of work for this if you paid a developer to fix it. At best, half hour increments for the fix. But more likely, for the full hour. Also, in this comparison, the consultant is on call every day, morning, afternoon, evening, for whatever you wanted and will jump on the job immediately.