Answer:
$16.2 trillion
Explanation:
If the long run equilibrium price level is 108, it means that the GDP calculated with nominal prices is 8% higher (= (108 - 100) x 100) than the GDP calculated with real prices. To calculate the full employment at nominal GDP (nominal prices) we need to multiply real GDP by 108% = $15 trillion x 108% = $16.2 trillion