The standard labour requirement of a product is 15 Category I workers and 20 Category II workers at the rate of OMR 8 per hour and OMR 4 per hour respectively. During a 30 hours week actual labour used are: 10 Category I employees at the rate of OMR 10 per hour and 18 Category II employees at the rate of OMR 5 per hour. If the revised standard hour for Category I and Category II are 360 hours and 480 hour respectively, find out the Labour Mix Variance. a. Category 1 - OMR 480 A, Category II - OMR 240 F b. Category 1 - OMR 240 A, Category II - OMR 480 F c. Category 1 - OMR 480 F, Category II - OMR 240 A O d. Category 1 - OMR 240 F, Category 11 - OMR 480 A