How much is an Everest Base Camp permit?

Could you please elaborate on the cost of obtaining a permit for the Everest Base Camp? Is there a standard price for the permit, or does it vary depending on factors such as the time of year or the number of people in the group? Additionally, are there any additional fees or requirements that need to be met in order to secure the permit? Understanding the financial aspects of this endeavor is crucial for those planning a trip to the Everest Base Camp.