Compare cells, if true, result in another column

Hi all,

See attachment for example

My students takes an exam.

Student has 19 points (M5 =SUM(C5:L5)) of 110 points.

2,6 is than the result of the student his exam

I want to compare colums M with column O and column O with column P.

Result column P sets automatically in column B

Example:

I want that Excel automatically set B5 to 2,6

M5 result compare with O1:O223, if true compare it with P1:P223 and that's the result for B5.

What's the correct formula?