In my DSO, i have billing date and Invoice amount. Client wants to view the Invoice amount on monthly basis. I would like to add 0FISPER in DSO and map it to Billing date. But the info object OIFISCVARNT, which field i should map. I checked the SID table of the 0FISCPER and found K4, W1 and W2 Values. Do i need to hard the values in Transformation.