The figure below shows a portion of the horizontal perspective of an accounts payable/cash disbursements (AP/CD) process. The following functional titles (for the AP/CD process organizational structures and the entities with which the AP/CD process interacts) and information flows, depicted as documents, generated or captured by the AP/CD process, have been omitted.
Required:
Complete TB Figure 13.1 by inserting the letter corresponding to the:
(a) functional titles inta the baxes
(b) information flow descriptions in the document symbols 
Definitions:
Real GDP
Gross Domestic Product adjusted for inflation, providing a more accurate depiction of an economy's size and how it's growing over time.
Aggregate Demand
The total demand for all goods and services in an economy at a given overall price level and in a given time period.
Keynesians
Economists who follow the theories of John Maynard Keynes, emphasizing the need for government intervention to manage economic cycles.
Supply-Siders
Economics theorists who believe that reducing tax rates and deregulation can stimulate economic growth by increasing supply.
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