Cost vs benefit analysis of responses to SARS-CoV-2 pandemic

1. 3 month global quarantine
Rolling hard 3 month quarantines with 24/7 curfew in every country, one country at a time, travel bans except between countries that have quarantined and eradicated SARS-CoV-2
Cost: 17,500,000,000,000 USD (70000000000000 USD world annual GDP * .25 years)
Time: 3 months
Lives lost: 500,000

2. Global N95 respirator and face mask use
Entire world population wearing N95 respirator or face mask at all times for 3 months to prevent transmission of SARS-CoV-2
Cost: 7,800,000,000 USD (7800000000 world population * 1 USD per mask)
Time: 0 (DIY cloth or paper mask) - 2 months (N95, 100000000 unit production rate per day)
Lives lost: 500,000

3. Mass RT-PCR test + Selective quarantine
Testing entire world population to find all infected, 3 month quarantine for infected only
Cost: 780,000,000,000 USD (7800000000 world population * 100 USD per test)