Radio Blog in relation to my free webhosting bandwidth problem

[master_bacarra 0]

so here's the thing. i got this really neat application that plays songs from a list of songs. you can place this application to your website so people can listen to your songs while they are surfing your site. it's called radio blog. the difference between radio blog and other players like media player that you can add on your site is that you don't need to upload the entire mp3 on your hosting site (so it won't consume a lot of space). it has a converter that converts mp3's to a much lower size files with rbs extension name.but here's the problem in relation to the bandwidth of Xisto's hosting accounts. isn't it that bandwidth is consumed once people visit your site? so if i try to play the radio blog that is placed on my site, how much bandwidth can be consumed if, let's say, the rbs files have an average of 500kb size each? does anyone here have any idea on how to compute bandwidth consumed by visiting a webpage?