Hide price only in a specific category

Is possible hide price only in one specific category of my store?

Now I use this in "Page Header Code Injection" but I would like to use it only for one category.

<style>
.product-price { display:none !important;}
.sqs-add-to-cart-button-wrapper {display:none!important}
</style>

Thanks
Filippo 

Please see the following.

Let us know how it goes.