Mathematics · Cost Accounting

A manufacturing entity uses standard costing. The standard cost card specifies that each unit requires 4.50 standard hours of labor at a standard wage rate of 18.00 per hour. During the month, the company completed 4,000 units. It paid for a total of 19,200 labor hours at an actual wage rate of 17.50 per hour. Due to a mechanical breakdown, the labor force remained idle for 400 hours, during which no production occurred although workers were paid. Calculate the Labor Efficiency Variance and the Labor Idle Time Variance.