Answer:
$10
Step-by-step explanation:
Deadweight loss of tax is the loss in economic efficiency as a result of tax. It is the reduction in consumer and producer surplus as a result of tax.
Before the tax, consumer surplus :
For max = $45 - $30 = $15
For Charles = $40 - $30 = $10
Total consumer surplus = $25
After the tax, consumer surplus -
For Max = $45 - $35 = $10
For Charles = $40 - $35 = $5
Total consumer surplus = $15
Loss in consumer surplus = $25 - $15 = $10
I hope my answer helps you