Consume Non valuated stock

Dear Gurus,

I need to consume the non valuated stock for a valuated material. When we created the material, we did as non valuated and created 1000 eaches of inventory. After few months, we changed into valuated by adding price to it and then we received 500 each.

Non valuated inventory - 1000 each.

Valuated inventory - 500 each.

Moving pice - $1.

Total value - $500.

Now the inventory is showing 1500, but the valuated is only 500.

How do we remove the 1000 eaches from the inventory. Please help.