If you don't know, you don't know. So you have to ask....somebody.andygabrys wrote:that's a pretty good idea.
if you have no idea - ask them.
the most important things here are:
1. the song is pre-written / produced - you could be dealing with typical library rates
2. the clients budget. If they have stated "keep it reasonable" - then reasonable relates to a number they have in mind - so I think its pretty reasonable to ask them what their concept of "reasonable" is. They might have a $ range. You can negotiate within that.
There are some music libraries that have their rate cards posted on their sites. Here is one. not the gospel, just one point on the graph.
http://freeplaymusic.com/licensing/ratecard.php#ppu
good luck.