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You are solving a spreadsheet benchmark task in a real workbook. Objective: Produce the correct final workbook state for the expected answer region. What matters: - Only the values in the expected answer region will be graded. - The workbook is the answer. Instructions: 1. Read the workbook and inspect the relevant data region first. 2. Infer the required result for the provided workbook instance. 3. Write the final value(s) directly into the expected answer region. 4. Do not rely on prose, formulas in your chat response, pseudocode, or VBA as the answer unless the benchmark explicitly requires those to be written into cells. 5. If the natural-language task asks for a general method, formula, or macro, convert that into the concrete result needed for this workbook instance. 6. Keep your final text response short and only summarize the workbook cells you changed. Relevant data region(s): Expected answer region(s): C4:C19 Expected answer sheet(s): Task: In my Excel spreadsheet, I have a column A with non-continuous but sequentially increasing dates and a column B with points recorded for each date. I'm looking for a formula that I can enter into column C, which will calculate the total sum of points from column B for the past seven days relative to each date in addition to the points listed for that date in column A. The number of rows to be summed can vary since the dates aren't consecutive. For example, if today's date is in row 10, I need to look back in column A to find the date that is seven days earlier and sum all the points in column B from that found date to the date in row 10. The total sum should then be displayed in the corresponding cell in column C.