Is it possible to add FormCalc & Javascript to field?

Hello Adobe Fam,

Was wondering if it is possible to add Javascript & FormCalc to a field.  I had this working perfect in Adobe Acrobat but can't seem to figure out what I need to do for LiveCycle?

Have 5 dropdowns that will do a average calculation and any fields that have N/A selected I want totally out of the average and not even counted at all.  Average is working perfect but not sure how to go about getting the N/A fields out of the average calculation

I was going to try and use same javascript function I have in the Adobe Acrobat form but not sure how to do so when the calculated field is already doing the formcalc function for average?

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Thanks for any help!