You have been given the following information: Actual labor-hours used 315 hours Standard materials price $2.50 per unit Actual labor rate per hour $3.00 450 units 300 hours $2.52 per unit Standard quantity of materials used Standard labor-hours used Actual materials price Standard labor rate per hour I Actual quantity of materials purchased and used What is the materials efficiency variance? $3.10 445 units None of the answers are correct. O $12.50 O $0.10 O $12.60 $0.02