In a simple 300 million-person world of all four-person families, if the poverty line is $20,000 and half of the 10 million families (with 40 million poor people) earn $17,500 and the other half earn $15,000, then the poverty gap is multiple choice $37.5 billion (= 5 million * $2,500 + 5 million * $5,000). $150 billion (= 20 million * $2,500 + 20 million * $5,000). $400 billion (= 20 million * $20,000). $200 billion (= 10 million * $20,000)