PHP JS form Programming

I need someone to work on this and amend it/create a php file so that when pressing submit it sends all data entered selected to a specified email address.

This is the current link to the page that needs work, php file has not been created and I'm not going to get the time
https://wildfestivals.co.uk/testcalc/Calculator.html

Any help would be much appreciated, this is a budget build.