The table shows the parking fees at a car park.

Time	Charges
First 1 hour or less	$2.50
Every additional 30 minutes or part thereof	$1.60
Overnight parking from 10 p.m. to 6:30 a.m.	$9

1. Mark parked his car at the carpark at 10.00 a.m. for 1 hour and 7 minutes. How much did he have to pay?
2. Gillian parked her car at the car park from 5:45 p.m. on Monday to 11 a.m. on Tuesday. Find the amount of parking fee that she had to pay.

(a)
Amount that Mark had to pay for 1 hour and 7 minutes
= 2.50 + 1.60
= $4.10

(b)
1 h = 60 min

From 5:45 p.m. to 6:45 p.m.: 1 h
Amount that Gillian had to pay from 5:45 p.m. to 6:45 p.m = $2.50

From 6:45 p.m. to 10:00 p.m.: 3 h 15 min

3 h 15 min = 3 x 60 + 15 = 195 min

Number of sets of additional 30 minutes in 3 h 15 min
= 195 ÷ 30
= 6 r 15

Number of sets of additional 30 minutes that Gillian had to pay for 
= 6 + 1
= 7

Amount that Gillian had to pay for all the additional 30 minutes or part thereof for 3 h 15 min
= 7 x 1.60
= $11.20

From 10:00 p.m. to 6.30. a.m. 
Amount that Gillian had to pay from 10:00 to 6.30 a.m. = $9

From 6.30 a.m. to 11 a.m.: 4 h 30 min

4 h 30 min = 4 x 60 + 30 = 270 min

Number of sets of additional 30 minutes in 4 h 30 min
= 270 ÷ 30
= 9

Amount that Gillian had to pay for all the additional 30 minutes or part thereof for 4 h 30 min
= 9 x 1.60
= $14.40

Total amount that Gillian had to pay
= 2.50 + 11.20 + 9 + 14.40
= $37.10

Answer(s): (a) $4.10; (b) $37.10