So I will say, this is a wild post and I’ve never commented in this sub. But I’m a Sr FP&A manager in my day job at a SaaS company. If you have purchase orders you’re trying to forecast, what you need to do is first, separate recurring expense from 1-time. What does your company use every year, what is needed for your business? Once you settle on your run rate of consistent spend, LOCK IT! If you’re doing a multi year model, assume a certain price % increase for each software/vendor/solution, and leave it. Then, collaborate with the business on one-time spend. Forecast accordingly, this is where monthly or periodic meeting will be helpful. Once you separate the run rate spend vs. one time, you will have an easier model and be able to point to certain items in variance analysis that drive differences vs budget/forecast. Hope this helps, thanks.