PHP expert to build calculator for wordpress website

Hi there,
I am looking for someone who can build me a calculator to intergrate into my woocommerce store.
Basically, we want someone who can build a calculator that the customer enters in some information, and it will tell them exactly what they need - and build a diagram for them of the components they need.

This is pretty technical, and the right candidate will need to be proficient in PHP/html. I will have an example of one that I need done, but I have to stress that we do not want anyone who will use code from the Upgrade to see actual info needs to be your own work