Required Compute variances for the following items and indicate whether each variance is favorable (F) or unfavorable (U): Note: Select "None" If there is no effect (l.e., zero varlance). Item Budget Actual Variance Effect Sales price SA $ 529 $ 658 Sales revenue $ 608,000 $ 584,000 Cost of goods sold $ 364,000 $ Material purchases at 5,000 pounds $ 286,000 $ AAA 391,000 279,000 F Materials usage SA Production volume Wages at 4,000 hours S 182,000 920 units S 186,000 U 990 units units None 59,100 $ 60,800 Labor usage at $16 per hour SA 97,800 $ 98,400 Research and development expense S 31,000 $ Selling and administrative expenses S 44,000 $ SAS 26,000 55,000