Excel Help Microsoft 365

Hello Community!  I need some help.  I do not know what formula to use or worse once I figure it out, not sure how to use it.  I have and idea on my company quote sheet I am working on.  I have cell B6 simply mirroring the total from cell F6.  What I would like help with if possible is a way to make it to where if the the total in cell F6 and B6 are less then $250, then cell B6 will automatically populate to $250.  I am not sure if that is a IF, OR, ROUND, etc.  I am still learning and at a novice level very much still.  Please help/educate me on what the route and how to make this happen.  Thank you all in advance and I look forward to learning from this community.