Refer to the accompanying graph to answer the questions. 
-The area that represents total utility is:
Definitions:
Ceiling Prices
Maximum legal prices set by governments for essential goods or services, intended to prevent prices from rising above a certain level during shortages or periods of high inflation.
Sales Tax
A tax on sales or on the receipts from sales.
Price Ceiling
A government-imposed limit on how high a price can be charged on a product or service, intended to protect consumers from conditions that could make commodities prohibitively expensive.
Price Floor
A government-imposed minimum price that can be charged for goods or services, intended to prevent prices from falling too low.
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