Answer: $18,224 unfavourable
Step-by-step explanation:
The materials quantity variance for the month will be calculated thus:
= Standard Cost per unit × ( Actual materials Used - Actual output)
= 13.4 × [( 4,300 - 700) × 4.2]
= $18,224 unfavourable
Therefore, the materials quantity variance for the month is $18,224 unfavourable