diff --git a/data/sc-im.md b/data/sc-im.md
index 6d9ce64..95135a0 100644
--- a/data/sc-im.md
+++ b/data/sc-im.md
@@ -35,8 +35,9 @@ gb4 = to to cell b4
 
 #Functions
 
+> =@sum(A1:A4) = add A1 to A4
 > =@avg(B1:B4) = average B1 to B4
 > =@max(B1:B4) = maximum of those numbers
 > =@min(B1:B8) = minimumof those numbers
-
+> =@prod(C1:C8) = multiply C1 to C8