I'm looking for scientific/statistical research and evidence that
supports the idea that use of jingles increases sales. I'm looking for
the following:

1) Research that shows retention of new word concept increases
when tied to music. It other words, if I sing a phone number to you
rather than just saying it, how much more likely are you to remember
the number?  If so, how much is the average increase in retention?
(NOTE: This is different that studies that research the effects of
background music on learning skills; i.e. it's not about whether you
can learn math better if you are listening to Baroque music; I point
this out because all of my previous efforts to find info online has
lead to this kind of research)
2) ($10 Tip for this specifically answered) Research that specifically
shows that brand recognition/familiarity increases when a person has
heard the brand name tied to music in a jingle repeatedly. If so, how
much is the average increase in brand familiarity verses just hearing
the name spoken?
3)  ($10 Tip for this specifically answered)Hard research (not just
advertising agency hype) that shows that sales actually increase when
a jingle is used to promote a product versus no use of a jingle. If
so, how much is the average increase in sales?

I will need the references. Citations in reputable business magazines
(Forbes, Inc, etc) or news sources (USA Today, Wall Street Journal,
etc.) will suffice for these answers. Thanks!