What happens to total surplus at equilibrium it the supply curve shifts from P=2+Q and becomes P=4+Q while demand is unchanged of equation P = 20-0? Total surplus tall by $17. Total surplus fall by $20.5. Total surplus is unchanged. Total surplus rises by $17. You are considering buying a monthly metro pass for the subway at $150 or paying $4 per ride (Pd). Your monthly demand curve is Pd = 60-2Qd where Qd is the number oi rides per month. Given this inlormation your consumer surplus will be $?84 buying each ride & $750 with the monthly pass. $?50 buying each ride & $900 with the monthly pass. $600 buying each ride & $700 with the monthly pass. $?B4 buying each ride & $900 with the monthly pass