How much does an Everest permit cost?

I'm curious to know, just how much does it actually cost to obtain a permit to climb Mount Everest? Is the cost relatively straightforward, or are there various factors that can influence the final price? I understand that the safety and well-being of climbers is paramount, so I'm guessing that the permit fees help to fund necessary rescue operations and other safety measures. But beyond that, what specific expenses does the permit cover, and how does the cost compare to other high-altitude expeditions? I'm eager to learn more about the financial aspect of this iconic challenge.