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 Variance Effect Sales price $ 658 529 A A Sales revenue $ 584,000 $ 608,000 364,000 $ 391,000 $ Cost of goods sold Material purchases at 5,000 pounds $ $ 279,000 186,000 286,000 182,000 Materials usage $ $ Production volume 990 units 920 units units $ A A 59,100 97,800 Wages at 4,000 hours Labor usage at $16 per hour Research and development expense Selling and administrative expenses 60,800 96,400 26,000 55,000 31,000 $ A 44,000