Answer and Explanation:
The computation is shown below:
Marcus’s original Consumer surplus is
= Willing to pay - customer actually pay
= $45 - $35
= $10
Marcus’s producer surplus from the resale is
= Amount received by producer - the minimum amount to accept
= $55 - $45
= $10
Starling’s consumer surplus from the resale is
Willing to pay - customer actually pay
= $80 - $55
= $25
And, the Total surplus generated from the resale is
= Producer surplus + consumer surplus
= $10 + $25
= $35