Date and Time Functions in Microsoft Excel - For Beginners

Time Functions in Excel Tutorial - TIME, HOUR, MINUTE, SECOND

How To Use The Date And Time Functions In Microsoft Excel

How to Calculate the Sum in Multiple Excel Tables at Once?

Two simple ways to SUM in excel | Autosum shortcut and dynamic table totals.

How to Sum a Column or Row in Excel | Easy Guide to Using the SUM Formula

How to use the SUM function in Microsoft Excel

How to Use the SUM Function in Excel

How to Sum Cells in Microsoft Excel (SUM, SUMIF, SUMIFS Functions)