We generally do not offer customization help when it comes to altering core functionality of the plugin. What you can do to hide the price box is add your own CSS. There was a similar thread where we discussed how to use the nth child selector to hide specific elements of the event editor:
The support post ‘Customizing the Add New Event Page’ is closed to new replies.
Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you.
Support forum for Event Espresso 3 and Event Espresso 4.