How do you guys keep track of your receipts and expenses on flips?

[Thomas Swindell]

We just closed on our first flip and I have monstrous folder of receipts and invoices. Do you keep everything on an excel spreadsheet? Do you scan the receipts electronically so you don't have a paper folder? I cannot imagine doing 10-20 flips a year and having to keep these big folders of receipts. Any suggestions on how to stay organized with expenses going forward to make my life easier? Any specific scanners that are affordable that specialize in this stuff?