Relieved Cost is zero for material after job completion.

We are following Standard costing method.

Item (Issue Component) cost is defined in Costing. Item is purchased Item ( Receipt & Deliver - On-Hand Qty Available)

Cost rollup is done. There is no change in BOM and in Routing.

Material is issued on the job.

When we perform Job Completion and see the WIP summary, We found Relived Cost for material is Zero

Which gives the variance relieved after job closed.

Please suggest.