Hi, I'm new on this forum. After nearly 6 years away from mosaics I've come back and am loving it more this time around. I've been given a 'commission' of 2 panels of 1800mm x 900mm to do. My problem is that I have no idea how much to charge per panel. I was hoping someone could tell me if I should charge by the square foot or by the hour and what is a reasonable fee to ask for. I'm not sure if I'm alowd to ask this question here but wasn't sure where else to go. Thanks.