4. Harrington Manufacturing has the following standard cost sheet for one of its products: Direct materials (6 ft.@ $5) $30.00 Direct labor (1.5 hours @ $10) Variable overhead (1.5 hours @ $4) Fixed overhead (1.5 hours @ $2*) 15.00 6.00 3.00 * Rate based on expected activity of 17,000 hours. During the most recent year, the following actual results were recorded: Production 12,000 units Fixed overhead $ 33,000 Variable overhead $ 69,000 Direct materials (71,750 ft. purchased) $361,620 Direct labor (17,900 hours) $182,580 Compute each of the following variances. Indicate whether the variance is favorable (F) or unfavorable A. Direct materials price variance. B. Direct materials usage variance. C. Direct labor rate variance. D. Direct labor efficiency variance