Answer:
Total output in Gamma is $2,400,000,000 and total output in Delta is $4,800,000,000.
Explanation:
The population of Gamma is 200,000 and the population of Delta is 400,000. Sixty percent of the population in each country is employed.
The number of worker in Gamma = 60% x 200,000 = 120,000 people
The number of worker in Delta = 60% x 400,000 = 240,000 people
Total output = Average labor productivity x The number of worker
Total output in Gamma = $20,000 x 120,000 = $2,400,000,000
Total output in Delta = $20,000 x 240,000 = $4,800,000,000