Adobe Acrobat Pro DC Fill & Sign Form

Question #1: I have several lines on a form to be filled in. If a line doesn't need information I would like the drop down menu to not show. (Ex below - I don't want the 101 - permits to show if not a description) I would prefer the lines to be empty. Is there javascript for this?

Question #2: After I "prefill" the form and sign and then send to the end signer, my numbers don't show up in the correct format. I have them set in the form to "Format/Number" with the decimal and dollar sign. (Example - photo below is after the end signer signs the form - my numbers aren't in the format I had set up in the form $xx.xx)