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: Male Standard Hrs 1200 Actual Hrs 1600 Female 600 400 Youth 400 200 2200 2200