I have a workbook consisting of 12 worksheets that represent the months of the year. Each worksheet contains columns representing the days of the week with each day consisting of two adjacent columns (i.e. AB, CD, etc.). The rows to the left of the columns list numerous objects, and each day I manually input data into the two columns that reflect the number of each object sold and the total amount of revenue received from that sale of those objects. At the bottom of each column there is a sum for the total number of objects sold and the total amount of revenue for the day. Not every object is sold each day. I have spent hours trying to devise a formula which will give me the average daily number of sales and the average daily revenue in a running fashion during the month when the formula includes blank cells from future days for which no data currently exists. AVERAGEIF does not work across multiple sheets, and other formulas I have tried including INDEX(FREQUENCY) seem to include the blank cells of future days which filters the average for the month to date data. Any help appreciated, thanks.