Answer:
$105
Step-by-step explanation:
Missing word "The deadweight loss of this tax is...?"
Change in price = $10
Original quantity = 89 units
New quantity = 77 unit
Change in quantity= 89 units-77 units = 12 units
Dead-weight loss = 1/2 * Change in price * Change in quantity
Dead-weight loss = 1/2 * $10 * $21
Dead-weight loss = $105
Therefore, the dead-weight loss of this tax is $105.