When the FireFox "suggest history" dropbox is used, neither the blur nor change event is fired. I have one solution that covers many of the common cases but fails on some others:
* Works - type, down arrow to suggest history, tab
* Works - type, down arrow to suggest history, enter, tab
* Works - type, click
* Works - type, tab
* Fails - down arrow to suggest history, enter, tab
* Fails - down arrow to suggest history, arrow right, tab
I have another solution which is to have a timer update the budget every 5 seconds. This will make sure that even if the blur/change events are not fired, the values will be updated soon. It's brute force but works (in FF so far, still need to test cross-browser). I'm not seeing any performance impact, even with debugging on.
#1350
* Subtotals will be updated as data is entered
* Created a helper to setup the fields with observers
* Added JavaScript functions to calculate the values
#1135