Answer:
c. 31.4%
Step-by-step explanation:
As we know that
Contribution margin ratio is
= Contribution margin ÷ Sales revenue × 100
where,
Contribution margin is
= Sales revenue - Variable manufacturing expense - Variable selling and administrative expense
= $1,920,000 - $957,000 - $360,000
= $603,000
And the sales revenue is $1,920,000
So, the ratio is
= $603,000 ÷ $1,920,000 × 100
= 31.40%