Large Function with Multiple Ranges

I am trying to use the large function over two ranges. Even though incorrect I will include my original formula that doesn't work to help illustrate.

if(large((L20:L500,W20:W500),1)=I20,$P$4,if((large((L20:L500,W20:W500),2)=I20,$P$5,0)))

Does anybody know of an easy way around this?