change cost to finish good item(standard cost method)show 0 in unit cost in item card proplem

I have one item as finish good.When i make production order to this item i see item cost in this production order in output is 0 from value entry table .

I go to item card i see unit cost is 0 to all transactions that made before. Now i want to change cost  from 0 to 210

Are using revaluation journal will do that OR using standard cost work sheet

thanks