Product Customizer will display your price per option in the same way that Shopify displays your currency options. If you change your Shopify currency options, Product Customizer will use this instead.

For example, some shop owners do not like that Shopify defaults to using a "space" between the currency symbol and price (for example, like this: $ 3.99)

If you want to change the currency or the display of your prices, you can do so from your Shopify currency options. These are under "Settings > General" in your Shopify admin: