Help : How to get stock item value in this code.

/*
Dear members,

can any one help me with this code.
i need stockitem value also with quantity.
Currently it is showing only quantity.

*/

[#Menu: Gateway of Tally]
Add : Key Item :Before : @@locQuit : Partywise Itemwise Sales : I : Display : GWLW Rep

[Report: GWLW Rep]

Use : DSP Template
Form : GWLW Rep
Variable : DoSetAutoColumn, PName
Repeat : PName
Set : DoSetAutoColumn : Yes
Set : DSPRepeatCollection : "GWLW Party"
Set : SVFromDate : $$MonthStart:##SVCurrentDate
Set : SVToDate : $$MonthEnd:##SVCurrentDate

[Form: GWLW Rep]

Use : DSP Template
Parts : GWLW Rep
Option : Set Auto Vch Option : ##DoSetAutoColumn AND $$SetAutoColumnsName

[!Form: Set Auto Vch Option]

[Part: GWLW Rep]

Lines : GWLW Rep Title, GWLW Rep Details
BottomLines : GWLW Rep Total
Repeat : GWLW Rep Details : Smp Stock Item
Scroll : Vertical
CommonBorder: Yes
Total : GWLW Rep Party, GWLW Rep Col Total

[Line: GWLW Rep Title]

Use : GWLW Rep Details

Local : Field : Default : Type : String
Local : Field : Default : Align : Center
Local : Field : GWLW Rep Name : Set as : "Particulars"
Local : Field : GWLW Rep Name : Widespaced: Yes
Local : Field : GWLW Rep Party : Set as : ##PName
Local : Field : GWLW Rep Party : Lines : 0
Local : Field : GWLW Rep ColTotal : Set as : "Total"
Border : Flush Totals

[Line: GWLW Rep Details]

Fields : GWLW Rep Name, GWLW Rep Party, GWLW Rep Col Total
Repeat : GWLW Rep Party
Total : GWLW Rep Party

[Field: GWLW Rep Name]

Use : Name Field
Set as : $IName
Display : Stock Vouchers
Variable : Stock Item Name

[Field: GWLW Rep Party]

Use : Qty Primary Field
Set as : $$ReportObject:$$CollectionFieldByKey:$BilledQtyMyFormula:GWLWSummVoucher
MyFormula : ##PName + #GWLWRepName
Format : "NoZero"
Border : Thin Left

[Field: GWLW Rep Col Total]

Use : Qty Primary Field
Set as : $$Total:GWLWRepParty
Border : Thin Left

[Line: GWLW Rep Total]

Fields : GWLW Rep Name, GWLW Rep Party, GWLW Rep Col Total
Repeat : GWLW Rep Party
Local : Field : Default : Type : String
Local : Field : Default : Align : Center
Local : Field : GWLW Rep Name : Set as : "Total"
Local : Field : GWLW Rep Name : Widespaced: Yes
Local : Field : GWLW Rep Party : Set as : $$Total:GWLWRepParty
Local : Field : GWLW Rep ColTotal : Set as : $$Total:GWLWRepColTotal
Border : Thin Top

;; Collection Definition

[Collection: GWLW Voucher]

Type : Voucher
Filter : IsSalesVT

[Collection: GWLW Summ Voucher]

Source Collection : GWLW Voucher
Walk : Inventory Entries
By : PName : $PartyLedgerName
By : IName : $StockItemName
Aggr Compute : BilledQty : SUM : $BilledQty
Search Key : $PName + $IName

[Collection: Smp Stock Item]

Source Collection : GWLW Voucher
Walk : Inventory Entries
By : IName : $StockItemName
Aggr Compute : BilledQty : SUM : $BilledQty
Filter : NonEmptyQty

[Collection: GWLW Party]

Source Collection : GWLW Voucher
Walk : Inventory Entries
By : PName : $PartyLedgerName
Aggr Compute : BilledQty : SUM : $BilledQty
Filter : NonEmptyQty

;; Variable Definition

[Variable: PName]

Type : String
Repeat : ##DSPRepeatCollection

;; System Formula

[System: Formula]

IsSalesVT : $$IsSales:$VoucherTypeName
NonEmptyQty : NOT $$IsEmpty:$BilledQty

;; End-of-File