The Excel SUM function returns the sum of values supplied as multiple arguments. SUM can handle up to 255 individual arguments, which can include numbers, cell references, ranges, arrays, and constants.
Excel Formula Training
Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.