Kokko Company makes a product that is expected to requite? hours of labor per unit of product The skandard cost of iabor is $6%. Konko actuily used 2 so hours of labor per unit of product The actuat cont of labor was $635 per hoct Kobko mode 1900 units of product daring the period. Based on the infortrabon olone, the labor usage variance is Nirive osdice 3610 twockie Sot untedcable $660 trarable surt troratio