That is very low.
I start at 3 cents a square inch however this includes the batting,thread and the quilting, this is for simple pantos or edge to edge, and shipping back to the cust.
If I provide the backing it's 4 cents a square inch.
Custom starts at 5 cents and up.
Heirloom and trapunto is 10 cents.
I only use Warm and Natural, Quilters Dream or Pellon batting.