Can you help figure out the red x...I keep getting it wrong and show me the formula please.

Problem 11-14 Basic Variance Analysis [LO11-1, LO11-2, LO11-3] Becton Labs, Inc., produces various chemical compounds for industrial use. One compound, called Fludex, is prepared using an elaborate distilling process. The company has developed standard costs for one uni of Fludex, as follows: Standard Price Standard Standard Quantity or Rate Cost Direct materials 2.00 ounces $30.00 per ounce $ 60.00 Direct labor 0.50 hours $14.00 per hour 7.00 Variable manufacturing overhead 0.50 hours $ 3.40 per hour 1.70 $ 68.70 During November, the following activity was recorded relative to production of Fludex: a. Materials purchased, 10,000 ounces at a cost of $287,000. b. There was no beginning inventory of materials; however, at the end of the month, 3,000 ounces of material remained in ending inventory. c. The company employs 20 lab technicians to work on the production of Fludex. During November, they worked an average of 130 hours at an average rate of $12.00 per hour. d. Variable manufacturing overhead is assigned to Fludex on the basis of direct labor-hours. Variable manufacturing overhead costs during November totaled $4,700. e. During November, 3,400 good units of Fludex were produced . Required: 1. For direct materials: a. Compute the price and quantity variances. (Input all amounts as positive values. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e, zero variance).) Answer is complete and correct. Materials price variance $ 13,000 F Materials quantity $ 6,000 U varianceb. The materials were purchased from a new supplier who is anxious to enter into a long-term purchase contract. Would you recommend that the company sign the contract? OYes ONo 2. For direct labor: a. Compute the rate and efficiency variances. (Input all amounts as positive values. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e, zero variance).) Answer is complete and correct. Labor rate variance $5,200 F Labor efficiency $ variance 12,600 U b. In the past, the 20 technicians employed in the production of Fludex consisted of 4 senior technicians and 16 assistants. During November, the company experimented with fewer senior technicians and more assistants in order to save costs. Would you recommend that the new labor mix be continued? Yes ONo 3. Compute the variable overhead rate and efficiency variances. (Input all amounts as positive values. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e, zero variance).) x Answer is complete but not entirely correct. Variable overhead rate variance $4,703 X F Variable overhead efficiency variance $3,060 U