I have a .xls file in which column A and column B are formatted identically,
All entries that are in coumn B are in column A but there are entries in col
A that are not are in col B, i.e. col B is a subset of col A. For every entry
in column A that exists in col B, I want to place "found" in col C of the
same row as A. How can I do this with VLOOKUP