calculating cell value via load script

[#1]

Hi,

Can someone help me with calculating cell value via load script.

Example data table

Book	Value
Sales	100
COGS	90
Gross Margin

Example Load script is:

DataRevenu:

LOAD

Book,

Value

FROM

[Revenue2011.xls]

(biff, embedded labels, table is [DATA2011]);

How can I calculate GrossMargin via the load script?

Thanks,

Paul