I have a worksheet that I need help on (See attached).
I need a formula that can track the total # of people impacted (Column 'E') per presenter (Column 'A') , but I need the formula to be able to account for lessons that occured on the same day (Column 'C').
Example:
A ............B...............C..........D.....E
Arun....Lesson 5.....14-Nov...3.75...18
Arun....Lesson 8.....14-Nov...3.75...18
Arun....Lesson 11...14-Nov... 3.75...18
Arun....Lesson 9.....10-Oct....3.75...30
Arun....Lesson 10...31-Oct....3.75...31
Sam....Lesson 5.....14-Nov...3.75...18
Sam....Lesson 8.....14-Nov...3.75...18
Ben.....Lesson 11...14-Nov... 3.75...18
Ben.....Lesson 9.....10-Oct....3.75...30
Ben.....Lesson 10...31-Oct....3.75...31
For "Arun", a basic SUM function would return 115, but I need a formula that would return a value of 79, because Lessons 5 8 & 11 occured on the same day and only impacted 18 people (i.e., not 54)
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