Thank you for your interest in our custom laser cutting service. If we provide the material, the material cost does count towards meeting our $25 minimum.
We've recently updated the Pricing for Laser Cutting page to include starting prices (per square foot) for a few of our most popular stocked materials:https://www.pololu.com/docs/0J24/2.
The actual material cost per square foot will vary depending on exactly what material it is, and how much will be required. We typically give price breaks on the material cost for high-volume orders.
If you haven't already, be sure to check out our Materials for Laser Cutting page for more information on the materials we've worked with: https://www.pololu.com/docs/0J24/3. And, if this is your first time laser cutting, please consider reading the rest of our Custom Laser Cutting Guide: https://www.pololu.com/docs/0J24.
If you have any further questions, please do not hesitate to contact us!