Ca = 25 + 0.75 (Y - 7) g = 50 Xp = 10 G = 70 T = 30 (Advanced analysis) The accompanying equations are for a mixed open economy. The letters Y, Ca, /g, X, G, and 7stand for GDP, consumption, gross investment, net exports, government purchases, and net taxes, respectively. Figures are in billions of dollars. The multiplier for this economy is4. 3. O 2 O 233