3. The following direct materials and direct labor data pertain to the operations of Riley Corporation for the month of November. Actual labor rate $13 per hour Standard labor rate $12.50 per hour Actual hours incurred and used 4,150 hours Standard hours 4,300 hours Actual materials price $128 per ton Standard materials price $130 per ton Actual quantity of materials purchased and used 1,220 tons Standard quantity of materials 1,200 tons Instructions 1. Compute the total, price, and quantity variances for materials and labor. 2. Provide one possible explanation for each of the unfavorable variances calculated above, and suggest where responsibility for the unfavorable result might be placed