Customisation Product with extra payment

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Hi all,

New to shopify here.
I just made a product customisation following one of the tutorial here:

Re: Product pages - Get customization information for products - Shopify Community

I'm wondering if it's possible to have the field impacting the price change? Like charging extra when customer adding in text/uploading file?

For instance, normal product is $5 but it will become $7 when buyer adding in text?

Many thanks