Answer
${$15,000,000}$
Work Step by Step
The anti-subsidy advocates are able to collect ${$0.50}$ from 10% of the population, which comes out to ${$0.50}$ from 30,000,000 people, or ${$15,000,000}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.