Define new (maybe invisible, or on another sheet) columns/field made with logical functions (like AND and OR) combining multiple criteria into one. Then use that single column in the SUMIF.
I need to SUMIF on multiple criteria. For example, SUMIF looks to one criterian in each statement. It refers to one range wherein that criteria will be matched. However, my criteria is made up of the combination of multiple variables, which are located in different positions on my spreadsheet.
Is there a way of doing this?