Calculating Days Of Supply Depends Sell Forcast

[#1]

hi all,

please find Attachment

i have Data in which i have  to calculate Days of supply Depend upon Sells Forecast Present in Data

i have given Calculation logic i have given in QVW/Excel

i have calculated two things initial Stock and Stock On Hand

problem with days of supply

[#2]

How Compare values from Two  Fields in script