The subscriber user can view a quote range that does not include Bing estimate (opt out)

DEMO: when user unchecks Bing checkbox -
The order displays total Quote Range that does not include Bing (user opted out)

Bing Monthly Budget field is NOT editable.

if user enters Monthly Budget and Bing IS checked, and then subsequently UNCHECKS BING, then the Monthly Budget that was entered is redistributed to other networks as appropriate to the remaining distributions instead of Bing.