I sell only the computer design time that it takes to digitize your overlay(s).  I have software that keeps track of the minutes for every file. 

My overlay design rate is $40 per hour (1 hour minimum).

The time spent in your local aircraft graphing your existing panel or graphing the panels you send me will cost you nothing.  You are also not charged for the time to make paper templates that I produce and cut to verify the overlays will match your panels before we work with plastic.

Overlay materials plus manufacturing costs is $25 per foot.   The manufacturer also charges a set up fee of $11.25 for each separate machine run.  Multiple colors cost slightly more.  Shipping and taxes are extra if applicable.  These costs are passed on to you as part of the total bill.

Examples:

There is a one-color overlay set shown on the Samples page for a C-150M.   The price for similar overlays is approximately $250 design time.  Add $25 per foot of material.

There is an orange overlay set shown on the Samples page for a local C-172.  The price for similar overlays is $160 design time.  Add $25 per foot of material.

The price for a 2 foot x 1 foot single color panel with 2 hours for design will be  $148.00 plus tax and return shipping if applicable.

Other:

The prices for vinyl decals are determined by the amount of design time at $40 per hour plus $7.50 per foot (single color) for printing.  Multiple colors are additional.