I need a spreadsheet formula that will reference an alternate numerical number in a sum function. I have a column of Priority values 1-22 and I want to assign a reverse value to each priority (i.e. 1=22, 2=21, 3=20, etc.) then I want to post the sum of the values incurred and not the sum of the numerical priority values in the cell at the bottom of the column. Should I be using LOOKUP in conjunction with SUM or SUMIF? Any ideas?