Need to control length of abandoned Cart retention

[wbyers]

Hello, We have something a desire to control the amount of time an abandoned cart will still on the books. According to our consultant there should be a virtuemart file somewhere where we could control this. The problem is he doesn't know where it is and I don't know where to start.
So, does such a control exist and if so, in what file is it controlled?

Version is VirtueMart 3.8.6 10373.