I have a table with three variables. I need to extract data based on the
value of three variables. For example:

Column 1 Column2 Column3 Column4 and so on...
4 5
10 8 8-0.25 8-0.375
10 12 10-0.25 10-.0375
12 8 9-0.188 9-0.375
12 12 11-0.375 12-0.25

Based on the above data, I would like to extract data when column1 is 10,
column2 is 12 and value in the first row is 5. The answer should be
10-0.375. I have tried index, match and vlookup. They only give answer for
two variables. Please help. Thanks