Applescript that multiplies cells in column

[Tricia Geib]

Hello,
	I am just beginning to learn Applescript, and I was wondering whether 
anyone had already developed a script that would multiply within a 
column (similar to the way OO already is able to add a column).
	For example, I am using OmniOutliner as a basic accounting program to 
track my flying expenses, and I'd like to calculate the fuel cost of 
flying x number of hours if I use 8 gallons per hour and fuel is $2.50.
	So, I have a column for Fuel with children: hours, price per gallon, 
gallons per hour, and a column with their values. I would like to be 
able to multiply these and show the total cost per month based on the 
hours flown either in the same column at the level of item: Fuel, or in 
a different column.
	Obviously, this would be easy to do in Excel, but I'm sure if I had a 
better grasp of Applescript I could work it out. Anybody already 
develop a script to do this?

Thanks!
T. Geib