Answer:
 $7,200 favorable 
Step-by-step explanation:
The computation of the material quantity variance is shown below: 
= Standard Price × (Standard Quantity - Actual Quantity) 
= $4 per gallon × (2 gallons × 7,000 units - 12,200 gallons) 
= $4 per gallon × (14,000 - 12,200 gallons) 
= $4 per gallon × 1,800 gallons
= $7,200 favorable 
All other information which is given is not relevant. Hence, ignored it