Use the figure below to answer the following question(s). Aggregate planned expenditure (billions of 2002 dollars) 400 45 line C+1 C 300 Fountains 200 100 50 25 O 100 200 300 400 Real GDP (billions of 2002 dollars) Figure 27.3.1 The economy shown in the graph does not engage in international trade and has no government. Planned aggregate expenditure equals the sum of consumption expenditure (C) and investment (I)