A group of workers consisting of 30 men above 30 years of age, 15 females above 30 years of age, and 10 youth of age between 20-30 are paid standard hourly rates as follows:

Males.........................

80/per hour

Females......................

60/per hour

Youth...........................

40/per hour

In a normal working week of 40 hours, the group is expected to produce 2,000 units of output. During a week, the group consisting of 40 males, 10 females and 5 youth produced 1,600 units. They were paid wages @ `70/- for males, `65/- for females and `30/- for youth per hour. 4 hours were lost due to abnormal idle time. The Actual and Standard Hrs are as follows:

Standard Hrs

Actual Hrs

Male

1200

1600

Female

600

400

Youth

400

200

2200

2200

Calculate labour variances