80. Dexter Surgical Tools has set the following perfection direct labour standard : 0.5 hours at $20 per hour , for each unitof Tool # 1 1 . The company plans to produce 1200 units of Tool # 1 1 in July ; however , the actual production was 1000 unitsand only 900 units were actually sold . The actual labour cost for July was $22 per hour .*If Dexter Surgical Tools decides to use a practical standard instead of the perfection standard , the labour efficiency*variance is likely toA. remain unchanged .B. increase .C. decrease .D. not enough information .