I replicated my individual invoice by running "Sales by customer detail" report. 

I set the reporting timeframe to match the timerframe of my invoice. I then applied a filter to that specific customer. It produced a report that matched all line items from my invoice that had been entered as a "Sale". The line items match up with my invoice perfectly. I exported to MS Excel and was able to sort and manipulate the data in excel to find any discrepancies and also export the data to other spreadsheets in my Project Management workbook. Saved me hours converting from PDF to MS Excel.