Hey @Tricia2 , Welcome to the 3Community 🙂
I'd love to be able to give you an exact figure however I would recommend bringing the device to your local Three Store who will send the device away to our repair partners. Once they receive the device the team will investigate the device to confirm if the screen cracking has caused any internal damage to the device. Once this is complete they will then provide you with a quote with the option to continue with the repair or alternatively the device would be returned to you.