Required Compute variances for the following items and indicate whether each variance is favorable (F) or unfavorable (U): (Select "None" if there is no effect (i.e., zero variance).) Item Budget Actual 390 S 390,000 S 180,000 S 140,000 S 89,000 Variance Effect 400 S 360,000 S 192,500 Sales price Sales revenue Cost of goods sold Material purchases at 5,000 pounds S 137,500 Materials usage Production volume S 90,000 950 units 900 units units S 30,000 S 48,000 S 11,000 S 29,350 S 48,500 S 12,500 S 20,000 Wages at 4,000 hours Labor usage at $12 per hour Research and development expense Selling and administrative expenses S 24,500