Hold Standard Cost based on Effectivity Date

Summary:

Is there a way to hold current on-hand inventory at the current standard cost, and then have future dated inventory hold at a different standard cost while not revaluing the current on-hand inventory to the new standard when that future date become current date?

Ex: Current inventory valued at $1000, on hand of 10 with standard cost per unit of $100. As of 7/1 the standard changes to $200. We want the 10 currently on-hand to stay valued at $100/unit but all future inventory made after 7/1 to be valued at $200/unit.

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