Our prices can't compare, as we pay around the $65 mark for a lap quilt and around $120 for a single.I even know a lady who paid $500 to have her double custom quilted.
However, I think Charisma gave you some experienced advice or you could do as they do in the shops here and charge a certain figure per square foot for simple meanders and extra for fancy stuff.Don't undersell yourself as it undermines the craft.