Urgent: Formular question: get first/last month value with qty value

Question

We've got a query result as the following:
Jan_2007 -- Feb_2007 -- Mar_2007 -- Apr_2007
0 --- 54 --- 0 --- 3
23 ---0 --- 12 --- 7
In the above query result,
1st row shows the sales quantity in Jan_2007 is 0, in Feb_2007 is 54, in Mar_2007 is 0, and in Apr_2007 is 3.
2nd row shows the sales quantity in Jan_2007 is 23, in Feb_2007 is 0, in Mar_2007 is 12, and in Apr_2007 is 7.
We would like to add a new column to get the first/last month value with quantity, e.g., in 1st row, the 1st month value with quantity value (>0) is Feb_2007, and the last month value with quantity value (>0) is Apr_2007. Therefore the 1st month value with qty is Feb_2007 and the last month value with qty is Apr_2007. In 2nd row, the first month value with qty is Jan_2007 and the last month value with qty is Apr_2007. But how to use formular to get the 1st/last month values with qty?
We will give you reward points!

Answer 1

Hello Kevin,  
You can create forumula using [Boolean Operator|http://help.sap.com/saphelp_nw04/helpdata/en/23/17f13a2f160f28e10000000a114084/content.htm]
IF<Logic Expression> THEN <Expression1> ELSE <Expression2> can also be made using a formula in the form
You can also use the [AND, OR Logical operators |http://help.sap.com/saphelp_nw04/helpdata/en/23/17f13a2f160f28e10000000a114084/content.htm]to check all the keyfigure columns.
Thanks
Chandran