A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The general form of VLOOKUP is:
=VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup])
lookup_value can only be a single reference or value, not a range like you have done.
It's hard to tell from the question exactly what is required without seeing some of the data, but the VLOOKUP part of the formula is likely to be something like:
=VLOOKUP(B7,L6:W8,B9+2,FALSE) and the overall formula in B17 like:
=B14*VLOOKUP(B7,L6:W8,B9+2,FALSE)
Perhaps try that, but if it doesn't work, can you reply with the values in B7 and B9, and a snapshot of the range L6:W8. From there we can probably work out the correct answer.