I am using weekly timesheet data that is copied into separate spreadsheets tabs. I am using a report spreadsheet to aggregate the data for weekly numbers and cumulative to-date figures based on project. I figured out how to add values across multiple spreadsheets using SUMPRODUCT/SUMIF/INDIRECT. The problem I am running into is how to create a dynamic range column in the SUMPRODUCT/SUMIF/INDIRECT formula based on the report date to sum my cumulative hours to-date on the project. The report date is set at the top and most of the other formulas on the spreadsheet are based on this value. I attached a photo of my current formula. Can anyone provide me a possible solution to my problem or let me know what additional data they need to figure out what I'm trying to accomplish?