I can't go back 20 years in my software, I started using this system in 2004. From June 1 2004-June 1 2005, my average R/O was $328. on 4014 invoices, and 7220 billed hours. From June 1 2016 to June 1 2017, my average invoice was 394, with 2552 invoices an... Login to read more.