IT departments: who does your admin paperwork & bills?

Hello there,

This is a question for IT shops who don’t have admin staff. I run a department of four people total and up until now I’ve handled most of the financial paperwork (submitting invoices and expense reports) myself. It eats up a lot of time and is probably not a smart resource allocation. I don’t have admin staff but I think I need to delegate some of this work to my staff. I have a sysadmin, a network admin and a help desk guy. How do you all decide who’s reponsible for paying the bills on time?

Thanks.