how to calculate the throughput for the expression

clear all;
clc;
B=100;
C=[0 0 41 4 0;
    45 12 0 0 15;
    6 43 0 0 10;
    0 0 23 42 0;
    26 27 0 0 44]
p=1:5
a=sort(p)
p(1)=1;P(2)=2;P(3)=3;P(4)=4;P(5)=5;
throughput=B*log2(1+((p(i)*gamma(i))/(sum(p(1:i-1).*gamma(i)))))

For the above mentioned code P(1)=1 indicates first row P(2)=2 indicates second row and so on till p(5)=5 indicates fifth row. gamma indicates the numbers(41,4,45,12,....26,27,44) present in the C matrix. From C i want to calculate the throughput with respect to rows and columns under the condition such that the rows and columns contain number in the same place.