Product Page Price Field doesn't Change when a Priced Option is Selected

Shopify's product page price field can only use one of the product’s variants. Since the priced options aren't variants of that product they are not able to change the price field.

There is a customization that can be done to your theme that hides your theme's regular product price field and creates a new one that can be changed by options. You can request this customization by emailing our Professional Services Team.