BatCo makes metal baseball bats. Each bat requires 1 kg. of aluminum at $18 per kg. and 0.25 direct labor hours at $20 per hour. Overhead is assigned at the rate of $40 per labor hour. Assume the actual cost to manufacture one metal bat was $40. Compute the cost variance and classify it as favorable or unfavorable. (Round Qty per unit to 2 decimal places.)