A gang of usually consists of 20 skilled workers, 15 semi-skilled workers and 10 unskilled with a standard rate of RO. 5, RO. 3 and RO. 2 respectively. The group is expected to produce 1200 units of a product in a 30 hour week. First week of August, the group consist of 15 skilled workers, 12 semi- skilled workers and 10 unskilled workers produced only 1000 units. The actual hourly rate paid for the group was RO. 4, RO. 3, RO. 2 respectively. Due to an industrial accident, the group could not work for 3 hours in the same week. You are required to prepare all the labor variances and answer the following questions.