How much are union dues? I am taking a union job and want to know how much it will affect pay..?

The union is IBEW 602 in Amarillo, TX. I can't seem to find any info on how much the dues are, I know they would be different depending on the union, but anyhow is it a hefty amount or something small, I really have no idea. The pay is 23.43 per hr if that helps any. I can't speak to any from the unionuntil next week sometime so I just want to get an idea before then if possible.