In Multiple sheets find Toms number of days taken and total them

[Ronan_321]

I need my formula to add Tom's annual leave (Recorded in a different cells on different sheets with some empty spaces and different names but within always in column A). 

The number of days are in column D. 

From all my sheets I need to total the number of days taken for my Total Sheet.

Entered beside his name I need to drag this formula down so I can use it for all the other names on my total page as well. 

[#2]

I would suggest you give us more details. A sample data would be a good example so we can try to assist you accordingly.

[#3]

@Ronan_321 Sheets go by months; column A goes by the Name of the Person; Column D is number of days taken.

How to I find the total number of days (COL. D) taken across a number of months(Sheets 1-7) and total it in my total page. I wish to do this for a number of people on the same list?

Col D where the names are have empty spaces in between names 

[#4 · Accepted solution]

FYI =SUMPRODUCT(SUMIF(INDIRECT("'"&$K$6:$K$8&"'!"&"A2:A10"),A4,INDIRECT("'"&$K$6:$K$8&"'!"&"D2:D10")))  @Ronan_321