IP Planning Function

Hi Experts,

I am working on IP. I need to write a planning function for the following requirement

PYNOTSLS = (PYSLS/PYNOMOP) * CYNOMOP

PYNOTSLS = Previous Year Notional Sales (Keyfigure)

PYSLS = Previous Year Actual Sales (Keyfigure)

PYNOMOP = Previous Year Number of months operated (DATE)

CYNOMOP = Current Year Number of months operated (DATE)

Is ther any option to calculate Date values

Please help me

Thanks in advance

Pushpa M