KPIs Benchmarking

All, I am wonder if anyone can help me on below. I tried to find the benchmark number for below KPIs. What will be the appropriate/reasonable number for me to set as the target for each of below KPIs?. What is the number recorded at the Best In Class companies? Purchase to Pay 1) Cost per Invoice 2) Supplier Payment on Time 3) Percentage of Electronic Invoices Record to Report 1) Days to Close 2) Percentage of Manual General Entry 3) Total record-to-report process cost per record-to-report full-time equivalent (FTE) Sales Order to Cash 1) Day Sales Outstanding (DSO) 2) Percentage of Billing Error 3) Percentage of Automate Invoice Thank You