1. Log into Facebook Business Manager and open the Ads Manager. Once there, open the hamburger menu on the top left-hand side, highlight over All Tools to open all options and select Billing in the fifth column.
2. Once in Billing, select your date range from the drop down, click on Update and then Download All Invoices.
3. After clicking on Download All Invoices, you will have the option to get a summary version or individual invoices. If you are looking for a summary of what was charged broken down by transaction Id, choose the first option, if you want it broken down by campaign, choose the second.