How do I make a player drop a certain amount of an item depending on their scoreboard value?

[Extenos]

So, I want to make a 1.8 PvP server, and I want to make it so that the player drops a certain amount of an item on death depending on the amount of kills they have. For example, if someone has 20 kills, and then they die, I want them to drop 20 gold which will be used as currency. (I also want to put the name of the currency in gold lettering, and I know how to.) However, if they only have 10 kills, I want them to only drop 10 gold. Also, I'm going to do the kills in scoreboard values, so I can reset their kill value to 0 when they die or when they trade the kills in for gold.