Express a mathematical formula in Excel

hi everyone. I am trying to work out how to create this formula (see the attached jpeg) in excel. Can anyone help? Is it SigmaSumScrubbed?


Many thanks!

To give you an Excel formula for this, we need to know what cells are the variable values are in. Where are these values? Do you have an Excel file with this data?

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Also, I changed your title (Help with a formula) to something that actually tells us something about your question. Most of the questions here are asking for help with a formula. For reference:

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