my calculation system is to make total work done till now and deduct Previous work done to get current value as shown in the doc
in my doc ( Pay Details ) page
i select pay number
and then select Previous nunber manully
and its not sufficent
i want aformula to populatue previous number
thank you very much
the formula works well
i need more help
when i select Previous number manully i have option to add filter to the lookup value as shown