Himalayan corporation fives you following data related to labours producing product A. The standard labour force for producing product A is: 25 Semi-skilled workers at Rs 0.75 per hour for 50 hours 10 skilled workers at Rs 1.25 per hour for 50 hours The actual labour force employed for producing product A is: 22 Semi-skilled workers at Rs 0.80 per hour for 50 hours 8 skilled workers at Rs 1.20 per hour for 50 hours Calculate all labour variances.