Hello, I have a website that is done with WordPress, we need to create office calculator that will print the result of calculation as well email the customer a copy. similar to this one: [login to view URL]
We need clean code, as well we need to be able to install it on differnt sites. also it should be provide with well guide that we can follow to setup it. codes must be done in a way that it wont overwrite if we update the theme.