Help needed for interview for FP&A position-Sales forecast

Hello guys,

I have a phone interview for the FP&A position next week. I've been doing the FP&A for almost two years and I've been focused on the expense side instead of the sales side.

Really need your help on the process of doing the sales forecasting/budgeting. From my understanding, monthly forecasting is collecting the data from the sales people and input into the forecast template. Is there any other process need to do for the forecast? What difficulties would you be facing when doing this? What kind of terms would be mostly used?

Besides, what questions would the hiring manager likely to ask for the phone interview?

Any suggestions would be appreciated. Thanks!