1. Rambai Sdn. Bhd. has the following standard cost for its product, Rott: Direct material Direct labour 5 kg X RM28 per kg 6.5 hours X RM33 per hour Additional information for the month of August 2021 is as follows: Units made Direct material bought Direct material used Direct labour 1,300 units 2,450 kg for RM63,700 7,100 kg 6,300 hours (direct labour cost of RM195,300) (a) Provide formula and calculate the following variances. Determine whether each variance is Favourable (F) or Unfavourable (U): i. direct material price variance ii. direct material quantity variance iii. direct labour rate variance iv. direct labour efficiency variance (12) (b) Discuss the reasons for favourable direct labour efficiency variance to occur. (4) (c) Explain the usefulness of variance analysis to the management of Rambai Sdn. Bhd. (4)