One of my Calculated fiels duplicate when totalling

At the bottom of the form there are 3 "Total" boxes. Total Distance Total Discount and Total Due.  I cannot get the Total discount box to calculate correctly.  If a selection is made in Total discount and it shows in the Total Discount box the Total Due doubles that amount.   If I disable the calculated fields then the amount is correct in Total Due but the total discount amount does not appear in the Total Discount box.   Where have I gone wrong?  

We'll check your calculation and get back to you with a solution.

Stay tuned!

I cloned your form and I was able to resolve it using a single condition.

Please clone this form so you can use it https://form.jotform.com/63659189600969 as well as figure out the setup.

Guide: http://www.jotform.com/help/28-Cloning-a-Form-from-a-Web-Page

Basically, I used form calculation fields on 3 totals and added a new total field to get the Total AERC from the NON AERC Member checkbox. I also assigned calculation value on every checkbox.

If you have further questions, let us know.