Billing based on contract item r12 12.1.3

My Client Is working at Construction Field ,With Job Order Basis
We will Create the Contract And Define All Item In Contract as it's . like ( Item Code - UOM - Unit Price )
For Each Job Order I Will Raise Invoice
Invoice Line Should Be From Contract Items with unite price
My Client Choose Contract Item in Invoice manualMy Client Is working at Construction Field ,With Job Order Basis
We will Create the Contract And Define All Item In Contract as it's . like ( Item Code - UOM - Unit Price )
For Each Job Order I Will Raise Invoice
Invoice Line Should Be From Contract Items with unite price
My Client Choose Contract Item in Invoice lines manual
How Can i Do This ?



i should have Oracle Service Contract ? or DTS ?