Camping Supply Company has developed a new camping lamp that runs on solar power. The solar cells charge in the sun all day and then the lamp is ready to run when the sun goes down. The company has a standard costing system to help control costs and has established the following standards related to the new camping lamp: Direct materials: 3 small solar cells per lamp at $0.60 per cell Direct labour: 0.75 hours per lamp at $12 per hour Variable overhead: 0.5 hours per lamp at $9 per hour Fixed overhead: 0.6 hours per lamp at $3.50 per hour During October 2019, the company produced 4,000 camping lights. Product data for October are as follows: Direct materials 14,000 small solar cells were purchased at a cost of $0.65 per cell. All cells were used during the month. Direct labour: 3,100 direct labour-hours were worked at a cost of $35,000. Variable overhead: $12,000 Fixed overhead: $6,000 Instructions (a) Compute the direct materials price and quantity variances. (4 marks) (b) Compute the direct labour rate and efficiency variances. (4 marks) (0) Prepare a brief explanation of the possible causes of the material price and quantity variances. (2 marks)