Deferred payments

At the top of my Amazon statement there is a section called deferred payments. Recently This jumped up which I believe is because Amazon moved us to dd+7 for disbursements. When I view any of my previous statements the deferred payment total always shows at the top but is a current total. Is there anyway to find out what the deferred payments balance was at the time of the statement? I want to check I am correct in terms of when this balance started to increase but I can’t find a graph or report where I can view this balance for anything other than the current total. Also please can anyone confirm whether that sales included within the deferred balance are included in the sales figures on the statement as I believe they are not included but just want to clarify? Thanks