Sign Customiser provides 2 different shipping price options: Flat and Volumetric Weight.
To set up Shipping Price, from your customizer editor page, negative to Required Options > Pricing and edit your pricing rules. On the pricing editor page, you will find the Shipping Price Method option. Choose either Flat or Volumetric Weight.
The Shipping price feature is currently only available with Advanced Model Customizers
For instructions on how to set up both options, please refer to the links below.