Request for the Booking App: hide price fields if the service is free

Hi Guys,

Thanks for the great booking app.
i have a request that you may consider in the next update
Imagine a scenario when you can a book an appointment on a website for free (just like a free initial consultation).
it might be a great feature in the booking app to add an option "Hide price fields if the price is zero".
this option should hide all price fields on the cart page and checkout page because they are not necessary anymore. see screenshots for more explanation.

thanks

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