The standard labour and the actual labour employment in a week for a job are as follows:

Skilled Workers

Semi-skilled Workers

Unskilled Workers

Standard number of workers in the gang

32

12

6

Standard wage rate per hour (Rs.)

3

2

1

Actual number of workers employed in the gang during the week

28

18

4

Actual wage rate per hour (Rs.)

4

3

2

During the 40-hour working week, the gang produced 1,800 standard labour hours of work. Calculate the Labour Variances.