To preview prices in your customizer from the product page:
Login to Kickflip.
Go to My products.
Hover over your product and click on the more icon, then select Preview.
Under "Select a pricing", select your pricing.
You can also preview your customizer from the product builder:
Login to Kickflip.
Go to My Products, and open your product.
In the top right of your screen, click on the eye icon.
Under "Select a pricing", select your pricing.
NOTE
In preview mode, only the default currency is displayed.