Laser CNC Pricing

I am just getting my laser table up and running hopfully this week. I have had some requests for pricing cutting of acrylic. I am not sure how to base the costing, and am looking for suggestions. I can post the files if that would help, but is there a general rule of thumb for pricing? I am using a lasermaster L20 and most requests I have had so far is cutting acrylic. I am in Calgary, Alberta.

Thanks for any suggestions you can lend.