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).) V ariance Effect Item Sales price Sales revenue Cost of goods sold Material purchases at 5,000 pounds Materials usage Production volume Wages at 4,000 hours Labor usage at $16 per hour Research and development expense Selling and administrative expenses Budget S 668 $ 589,000 $ 398,500 $ 284,000 $ 193,500 1,040 units $ 61,800 $ 96,900 S 31,000 $ 62,500 Actual S 534 S 618,000 $369,000 $ 293,500 $ 187,000 945 units $ 59,600 $ 98,800 $ 38,500 $ 49,000