Jamie,
Use the below formula to get the max of week1,week2,week3 & week4.
= If <Week4> > (If <Week3> > (If <Week1> > <Week2>
Then <Week1>
Else <Week2>)
Then <Week3>
Else (If <Week1> > <Week2>
Then <Week1>
Else <Week2>))
Then <Week4>
Else (If <Week3> > (If <Week1> > <Week2>
Then <Week1>
Else <Week2>)
Then <Week3>
Else (If <Week1> > <Week2>
Then <Week1>
Else <Week2>))
-Sri Harsha