Answer:
$30
Explanation:
Since the first part is missing, I looked for a similar question:
the contribution margin of sandals = selling price - variable costs = $50 - $35 = $15
the contribution margin of shoes = selling price - variable costs = $150 - $90 = $60
weighted average contribution margin = (weight of sandals x contribution margin of sandals) + (weight of shoes x contribution margin of shoes) = (2/3 x $15) + (1/3 x $60) = $10 + $20 = $30
