The Fletching Calculator contains a list of the costs associated with the creation of bows and ammunition in the game RuneScape based on data from the Grand Exchange Market Watch. It helps players find out whether they are eligible to make an item or not.
The Watch monitors the pricing and item information on the goods traded in the in-game Grand Exchange. In RuneScape, the Grand Exchange is the player-to-player trading system where nearly every item in the game is traded. The trading system is automated, and a player does not need to monitor a transaction for it to be successful. Money made from the trade is then retrieved from any in-game bank facility.