The Monroe Corporation manufactures lamps. It has set up the following standards per finished unit for direct materials and direct labour: Direct material: 10kg @ $4.50 per kg $45.00 Direct labour: 0.5 hour @$30 per hour 15.00 The number of finished units budgeted for January 2019 was 10,000; 9,850 units were actually produced. Actual results in January 2019 were: Direct materials: 100,000kg purchased @ $4.65 per kg Direct materials: 98,055 kg used Direct labour: 4,900 hours $154,350 Required: a) Calculate the January 2019 price and quantity variance of direct materials b) Calculate the January 2019 rate and efficiency variance of direct labour. c) Comment on the January 2019 direct materials and direct labour variances