4(a).PATIENCE Ltd. manufactures two products X and Y. Product X requires 5 hours to produce while 5 units of product Y can be produced in one hour. In July 6000 units of X and 30,000 units of Y were produced. Activity Ratio is 93.75% of Capacity Ratio and Capacity Ratio is 102.4% of Efficiency Ratio. Calculate Idle Capacity Ratio.

4.(b) Average of Actual Price per kg of material and Standard Price is ` 45.Difference between the Standard Quantity of material required per unit and Actual Quantity of material is 16 kg. Average of Standard Quantity of material required per unit and Actual Quantity of material is 52 kg. Material Cost Variance is ` 200. Calculate the Material Usage Variance.