How points are calculated

This isn't exactly a maths question but I'm hoping someone can shine some light on this for me. I know that in the Leaving Cert your 6 highest grades are taken for points, and that's how you get into a university. That's all well and good, but let's say you get a B3 in an ordinary subject (French for example) and a C1 in a higher level (like chemistry) Will they use the points on the B3 instead of the C1 because it's a higher grade, or the C1 because it's worth more points? Thanks to anyone who answers

John smith234— 23/05/16