Answer: $1,260 Favorable
Explanation:
Material usage variance = (Standard quantity of materials actually produced - Actual quantity of materials actually produced) * Standard price of material
= [ ( 4 * 6,300 ) - (3.9 * 6,300) ] * 2
= [ 25,200 - 24,570 ] * 2
= 630 * 2
= $1,260 Favorable