Help with Parsing Data

[Lee Hendrix]

I am creating an app that allows me to pick a specific model of a product by putting a check in the box. It then displays that model number, it's width in inches and it's electrical requirements (120 VAC, 220 VAC).

Whenever multiple models (checkboxes) are selected, I need to pull the widths from each model record and add them together so I'll have the total width when all models are connected together which I can display as a label.

Model:ABC123 34" 208-240VAC

Model:DEF456 36" 120VAC

Total Width=70"

Not sure why I cant make this work. Probably easy for most of you out there!

Thanks for any help/suggestions