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SmartSound manufactures headphone cases. During September 2018 , the company produced and sold 108,000 cases and recorded the following cost data: (Click the icon to view the cost data.) Read the requirements. Requirement 1. Compute the cost and efficiency variances for direct materials and direct labor. SC = standard cost; SQ = standard quantity.) Data table Requirements 1. Compute the cost and efficiency variances for direct materials and direct labor. 2. For manufacturing overhead, compute the variable overhead cost and efficiency variances and the fixed overhead cost and volume variances. 3. SmartSound's management used better quality materials during September. Discuss the trade-off between the two direct material variances