help me how to write funstion spec on this report : its matter of my life

They will fire me if i do not complete this task:

1. Write functional spec by market business and product business

Senario: We are in leacy system and now going live on ECC 6.0 August and this is the requirement from PP division as they want exact field to be mapped to ECC 6.0

Fields Required:

Job # = Production # in sap

customer

Order Type

Net selling price

Material

Material Over head

Labor hours

Labor

Labor Over head

Total

Purpose: This report will balance to total WIP on balance sheet. However, it breaks WIP into the Market Businesses and Product Businesses that we utilize. Each business has its own manager who has responsibility for the WIP in their business.

fUNCTIONAL CAN BE SIMPLE SICNE I HAVE NO IDEA IF THERE ARE ANY STANDARD REPORT I CAN REFER TO .............OT HOW SHOULD I START TO WRTIE

PLEASE HELP ME!!!!!!!!!!!!!!

urgent

Can you all explain the frame work or hw should i start workign on it

Fields required