Hi @GebelAlainaM It would be really helpful if you'd read the original question and if something isn't totally clear please ask. The last person didn't read it either! 

For example you say, "In QBO, if the hours worked are within the 60-hour limit, you can create the next invoice for the same $9000 without any additional charges. 

I asked what about the underage of hours. On the invoice, we'll have the 9k charge for the next month, and we'll have the items with time for the current month to draw down the base charge. There will be some leftover in that account. How does that get cleared?