The mall charges 50 cents for the first hour of parking and $3 for each additional hour until the customer reaches 4 hours, after that the parking fee is $1 per hour. If a certain customer parked his in the mall for 7 hours and 30 minutes, how much is he going to pay?  Select:
A) $11.5.  B) $12.  C) $13.  D) $14.5  E) $15.
$13.harges for 7 Hours = ( First hour @ $ 0.50 ) + ( 3 hours @ $ 3 ) + ( 3.5 hours @ $ 1 )   $13.harges for 7 Hours = ( 1 @ $ 0.50 ) + ( 3 hours @ $ 3 ) + ( 3.5 hours @ $ 1 )   $13.harges for 7 Hours = ( $ 0.50 ) + ( $ 9) + ( $ 3.5 )   $13.harges for 7 Hours = ( $ 0.50 ) + ( $ 9) + ( $ 3.50 )   $13.harges for 7 Hours = $ 13   Hence correct answer must be ($13.)
<result>C</result>
The mall charges 50 cents for the first hour of parking and $3 for each additional hour until the customer reaches 4 hours, after that the parking fee is $1 per hour. If a certain customer parked his in the mall for 7 hours and 30 minutes, how much is he going to pay?