At the core, this formula uses the COUNTIFS function to count dates that are greater than or equal to the first day of the current month, and less than the first day of the next month. The EOMONTH function is used to create both dates...Read more
At the core, the OFFSET function delivers a range of 3 cells to SUM, which returns a summed result.
The arguments for OFFSET are provided as follows:
For reference we use the first cell in the data range, B5, entered as a ...Read more