Turquoise Inc., a manufacturing company has a sector that manufactures candles. It produced 25,000 units of candles in a month. It requires 0.25 hours per unit. The standard labor rate is $5 per hour. The actual direct labor time was 8,000 hours, and the actual direct labor cost for the period was $36,000. Calculate the direct labor rate variance. O a. $3,500 unfavorable O b. $5,000 favorable O c. $4,500 unfavorable O d. $4,000 favorable