How to quote materials accurately and avoid underbidding as a landscaping contractor?

Hey everyone, I’m a small landscaping contractor just starting out to use the jobber and the interface and one of the challenges.

Me and my team are having is consistent quoting. Often times we find ourselves going back to clients because we underbid materials and I’m not pleased about it.

What is the best way in jobber that you guys find to help quote out jobs?

Do you just have a baseline markup on all your materials or do you go different each job?