I can't seem to get this form to calculate the 3 options. Can someone please help?

On this form I can't get the form to add the selected options.  I'm not good at code at all, but I'm sure this is very simple for someone who does know code or is more familiar with jotforms.  It's for a customer so I need it as quickly as possible and I just can't figure it out.

If someone could help I'd appreciate it greatly!!

Here's the form:

http://www.jotform.com//?formID=43575646960971

Thank you!!