As the only direct financial link between The Kingdom of Loathing and a real-world economy, the Mr. Accessory (an in-game item received in return for donating $10 to the game maintainers) is the perfect indicator by which to measure the current exchange rate. These items are commonly used to amass great in-game wealth; players donate to receive a Mr. A and then sell it in the mall for millions of meat. The KoL exchange rate can therefore be calculated by finding the cheapest current asking price