Cartel Coins
$4.99 - 450 coins
$9.99 - 1000 coins - 100 bonus
$14.99 - 1600 coins - 250 bonus
$19.99 - 2200 coins - 400 bonus
$39.99 - 5500 coins - 1500 bonus
Thanks to Dulfy and LordArtemis
http://www.swtor.com/community/showthread.php?t=552743
$9.99 does not sound like too much for the extra bars to me.