What could be causing errors in formulas?
* Numbers: The numbers in the formula could be wrong.
* References: There could be a missing or wrong cell reference in the formula (an easy way to check this is by turning on a cell’s arrows to see which cells it references).
* Operators: The operators, like +, -, *, /, could be wrong.
* Parentheses: Many formulas use parentheses to group numbers, cell references, and operators. Make sure that yours are grouping correctly.