document.write( "Question 456906: A restaurant has fixed costs of $143.75 per day and an average unit cost of $5.75 for each meal served. If a typical meal costs $7, how many customers must eat at the restaurant each day for the owner to make a profit? \n" ); document.write( "

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A restaurant has fixed costs of $143.75 per day and an average unit cost of $5.75 for each meal served. If a typical meal costs $7, how many customers must eat at the restaurant each day for the owner to make a profit?
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\n" ); document.write( "Let x = the number of meals served
\n" ); document.write( "Then the equation for the revenue is
\n" ); document.write( "R = 7x - 5.75x - 143.75
\n" ); document.write( "R = 1.25x - 143.75
\n" ); document.write( "The break-even point is for R=0:
\n" ); document.write( "1.25x=143.75
\n" ); document.write( "This gives x = 115
\n" ); document.write( "To make a profit, R must be > 0
\n" ); document.write( "Therefore, they must serve 116 customers to make a profit \n" ); document.write( "

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