Documentation/How Tos/Calc: SMALL function
From Apache OpenOffice Wiki
Returns the nth smallest value in a list of numbers.
- returns the nth smallest number within the (unordered) range or array of numbers numberlist.
- where cells B1, B2, B3, B4 contain 4, 7, 5,and 8, returns 7. The lowest number is 4, then 5, then the third lowest is 7.