I have been testing with first lab for well over a year. This morning I got a notification saying they wanted to test my hair. This is the first time this has happened. How much will this cost me? I've been clean for well over two years so I'm not worried about the results. I'm just interested if anyone else has been called for this. I didn't even know it was an option. I was told I would be submitting uds. Any incite would be helpful. Thanks.