select 700Mb of music :-)

[capitan harlock]

hello folks,
I'm trying to automate the creation of one playlist for burn a cd of
mp3. I want use it on my car radio.

At the moment I have found this select

dcop amarok collection query "select tags.url,tags.filesize from tags
join statistics on statistics.url = tags.url where tags.length > 60
order by statistics.percentage desc"

but I do not know like limiting the list to 700Mb.


Thanks for the aid
debharlock