A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Use:
=SUM(LARGE(A1:A10,{1,2,3}))
This returns the 1st, 2nd, and 3rd largest values in the range, then adds them together.
If the range is different, replace A1:A10 with the actual range.
Example:
=SUM(LARGE(Q16:Q157,{1;2;3}))
LARGE(array, k) returns the k-th largest value in a range, and SUM adds those returned values.
References: