How important are A Levels after uni?

I received my results today after getting A* A C last year and resitting maths as I needed a B for my university to do economics. As an external candidate my school just gave me the exact same grade (C) after a years work even though I was only 3 marks from a B last year. Fortunately my university still accepted me however I’m wondering if this C in maths will hinder my employment chances after uni or not, especially in the field in economics.

Any info would be much appreciated