Excel - Unique text formula

Issue

I have 2 columns of names in columns a & b and a list of dates in column c. Column A has a unique name in each cell. Column B had the same 5 or 6 names next to each name in column A.

Column C is the date the name was added to the list. I need a formula to tell me how many unique names in column a were added by a user in column B before the date in column C.

I've read on 'Count the number of unique values by using functions' & 'Count how often multiple number values occur by using functions' but can't get it. Any help offered would be greatly appreciated. Thanks in advance.

client added by date added how many added before 'date added'  
george james 1/10/10 12:00 PM answer here should be 0  
royale james 1/11/10 2:00 PM answer here should be 1  
walt james 1/11/10 12:00 PM answer here should be 2  
aj john 1/13/10 4:00 PM answer here should be 0  
justin james 1/14/10 9:00 AM answer here should be 3  
tam john 1/15/10 10:00 AM answer here should be 1  


client  
george  
royale  
walt  
aj  
justin  
tam  

added by  
james  
james  
james  
john  
james  
john  

date added  
1/10/10 12:00 PM  
1/11/10 2:00 PM  
1/11/10 12:00 PM  
1/13/10 4:00 PM  
1/14/10 9:00 AM  
1/15/10 10:00 AM  

how many added before 'date added'  
answer here should be 0  
answer here should be 1  
answer here should be 2  
answer here should be 0  
answer here should be 3  
answer here should be 1

Solution

It will first sort on the name who added, then by date and then by client. If you want to see it back in old sort order, you can add rows number to each row before and once macro is done, re-sort of the row number.

But if sort is nothing big, then u can use it as is

Cells.Select  
Selection.Sort _  
Key1:=Range("B2"), Order1:=xlAscending, _  
Key2:=Range("C2"), Order2:=xlAscending, _  
Key3:=Range("A2"), Order3:=xlAscending, _  
Header:=xlYes, OrderCustom:=1, _  
MatchCase:=False, Orientation:=xlTopToBottom, _  
DataOption1:=xlSortNormal, _  
DataOption2:=xlSortNormal, _  
DataOption3:=xlSortNormal  

lrow = 2  
AddedByName = Cells(lrow, 2)  
addCount = -1  
Do While Cells(lrow, 1) <> ""  
If (AddedByName <> Cells(lrow, 2)) Then  
addCount = -1  
AddedByName = Cells(lrow, 2)  
End If  

addCount = addCount + 1  
Cells(lrow, 4) = addCount  

lrow = lrow + 1  

Loop 

Note

Thanks to RIZVISA1 for this tip on the forum.