There are a lot of different factors that can affect how much you pay your editors, including the length of the project, the level of editing required, the number of editors you need, and your own budget. There are a few things you can do to get an idea of how much you should pay your editors.
First, look at the length of the project and the level of editing required. If you have a shorter project, you may not need as much editing, and you can probably get away with paying your editors less. If you have a longer project, or one that requires a higher level of editing, you'll need to pay your editors more.
Second, consider the number of editors you need. If you only need one editor, you can probably get away with paying less than if you need multiple editors.
Third, think about your own budget. How much can you afford to pay your editors? If you're on a tight budget, you may need to pay your editors less.
Ultimately, how much you pay your editors is up to you. There's no set amount you have to pay, and you can negotiate with your editors to get the best rate possible. Just be sure to consider all of the factors listed above to make sure you're paying a fair rate.