Subcontracting rate in costing

Hi Experts,

I have a requirement where a sub-con material is costed, the price should be picked based on the qty structure date mentioned during cost estimate instead of latest price in purchase info record.

For e.g.,

Sub con material A- Info record:

Valid from Valid To Amount

01092016 15092016 100

16092016 30092016 120.

When i run cost estimate for this material with qty structure date as 15092016, system will always pick the latest valid price from info record. But my requirement is the price should be pick based on the qty structure date mentioned during cost estimate.

Bhaskar