Answer:
$328 unfavorable and $152 unfavorable 
Step-by-step explanation:
a. The computation of the material price variance is shown below: 
= Actual Quantity × (Standard Price - Actual Price) 
= 8,200 × ($0.80 - $6,888 ÷ 8,200) 
= 8,200 × ($0.80 - $0.84) 
= 8,200 × $0.04
= $328 unfavorable 
b. The computation of the material quantity variance is shown below: 
= Standard Price × (Standard Quantity - Actual Quantity) 
= $0.80 × (8 × 870 - 7,150) 
= $0.80 × (6,960 - 7,150) 
= $0.80 × 190
= $152 unfavorable