Purchase value report

Question

please tell me how to start. i want to know from which table to start for the following requirement.
please tell all the steps. starting table and end table.
Report for Purchase Details:
Input Parameters:
**Plant:           - -
  to -
   (Multiple options)
Storage Loc      -  -
  to -
  (Multiple options)
Vendor             -  -
  to -
  (Multiple options)
**GR Date       -  -
  to -
  (Multiple options)
Material Type   -  -
  to -
  (Multiple options)
- Mandatory  &
Sto.Loc, Material Type & Vendor – should give any one input
Output Option:
- Summary of Purchase in Rs. (Storage loc. wise)
- Summary of Purchase in Rs. (Valuation Class wise)
- Detail Report – Line item wise
Display Option:
-     ALV Output
-     List Output
Required Output:
GR No.
GR Date
Material code
Material description
GR Qty
GR Value
PO No. & Line item.
Vendor code
Vendor Name
Plant
Storage Loc.
Valuation class
MRP controller
Wt. of Mateial (as per GR)
Mvt. Type
Reference (DC No.)
Report Logic:
It should consider 101, 102 & 122 Mvt.  made against Purchase orders(Std, FP & SC POs) and the outcome (Purchase value) will be net of these values.
Ensure only labour charges are considered for s/c receipts
Other Details:
     It should take the weight of ROH (castings) from GR
     Authorization to be given to all MRP, FIFO & Audit user
     Report can be executed in Background also.

Answer 1

mseg table price is inclusive of delivery cost so i want to take from EKBE table. ekbe value contains without delivery cost.
i know how to join and which table to consider. but i dont know from which table i have to strat writing logic.
my requirement is as follows.
REPORT FOR PURCHASE DETAILS:
Input Parameters:
**     Plant               -to-(Multiple Options)
     Material          -to-(Multiple Options)
     Storage Location     -to-(Multiple Options)
     Material group          -to-(Multiple Options)
     Material Type          -to-(Multiple Options)
     Purchse group          -to-(Multiple Options)
     MRP Controller          -to-(Multiple Options)
     PO Type               -to-(Multiple Options)
     Vendor               -to-(Multiple Options)
**     GR Date               -to-(Multiple Options)
**- Mandatory
Output Option:
-Summary of purchase in Rs. (Storage loc. wise)
-Summary of purchase in Rs. (Valuation class wise)
-Detail report -Line item wise
Display Option:
- ALV Output
- List output
Required Output:
GR NO.
GR Date
Material code
Material description
GR QTY
GR value
PO. NO. & line item.
Vendor code
Vendor Name
Plant
Storage Loc
Valuation class MRP controller
WT. of material (as per GR)
MVT.Type
Reference (DC.NO.)
It should consider 101, 102 and 122 MVT. made against purchse orders(Std, FP &SC POs(SCFX,SCEF and sch agreement))
and the outcome (purchase value) will be net of these values. ensure only labour charges are considered for S/C receipts.
Other Details:
It should take the weight of ROh (castings) from GR
Authorization to be given to all MRP, FIFO & audit user
Report can be executed in background also.