Please show me how you arrived at the solution, thanks!

1. The Exide Company is a single product company that uses standard costing system to control its costs. The standard and actual costs data for the most recent month to produce one unit of product is given below: Standard Actual cost cost Direct materials: Standard: 4.0kg at $7.20 per kg Actual: 4.4kg at $6.70 per kg Direct labor: Standard: 1.6 hours at $9.00 per hour Actual: 1.4 hours at S9.70 per hour Variable manufacturing overhead: Standard: 1.6 hours at S3.60 per hour Actual: 1.4 hours at $4.30 per hour $ 28.80 $29.48 14.40 13.58 5.76 6.02 Total cost per unit $ 48.96 $49.08 During the most recent month, 4,800 units of product were produced. The comparison of standard and actual cost on the basis of total cost is given below Actual cost (4,800 units x $49.08) Standard cost (4,800 units x $48.96) 235,584 235,008 Difference in cost-unfavorable 576 During the month, the company purchased 21,120 kilograms of materials from its vendors. There was no inventory of materials in stock at the start and at the end of month Required 1. (a) Compute direct materials price and quantity variances 2. (a) Compute direct labor rate and efficiency variances 3. Compute variable manufacturing overhead spending and efficiency variances (b) Make journal entries to record direct materials related activities during the month. (b) Make journal entry to record direct labor direct labor cost during the month The total cost variance of $576 is only 0.25% of $235,008 standard cost which means the company's costs are well under control. Do you agree? Explain What are possible causes of variances that you have computed in part 1, 2 and 4