Calculated total not saving to DB

No problem, one of the challenges with trying to help is that I cannot see how you have wired up your page. So what datasets do you have? What data collections do they map to and what are the column key names in the collection? how are the dataset columns wired up to your page? For example how are the drop downs configured? Given that you are new to javascript development solving your problem may only be doable by someone with experience accessing the Editor and taking a look at the page details. I can do this with you in a Google Hangout session or if you give me a contributor role I can probably solve the problem directly (I don’t work for Wix so don’t have the privileges to help you out otherwise). My contact info is in my profile and I will do this without charge if you are interested.