Final answer:
The materials price variance for March is $720 unfavorable.
Step-by-step explanation:
The materials price variance for March can be calculated by multiplying the actual quantity of materials used by the difference between the actual price per unit and the standard price per unit. In this case, the actual quantity of materials used is 7,200 pounds and the difference between the actual price per unit ($0.85) and the standard price per unit ($0.75) is $0.10. Therefore, the materials price variance for March is 7,200 pounds x $0.10 = $720 unfavorable.