Answer:
$28 per unit
Step-by-step explanation:
since the information is missing, I looked for similar questions:
contribution margin per chair = $50 - $35 = $15
contribution margin per table = $200 - $120 = $80
sales mix: 4 chairs + 1 table
contribution margin per sales mix = (4 x $15) + $80 = $140
weighted average contribution margin = $140 / 5 = $28