I have data in columns b c d, in column be data is spreadout across different lines. Ie data in

b2
b34
b56
b70
b89


then i have data in every row in columns c and d, What I am trying to do is find the max in column c based on column b's entries


ie

find max between

b2
b34

find max between
b70
b89

let me just say the # of lines (data) in b are thousands.