The table shows the parking fees at a car park.

Time	Charges
First 1 hour or less	$2.30
Every additional 30 minutes or part thereof	$1.80
Overnight parking from 10 p.m. to 6:30 a.m.	$5

1. Albert parked his car at the carpark at 6.00 p.m. for 1 hour and 6 minutes. How much did he have to pay?
2. Yen parked her car at the car park from 2:15 p.m. on Monday to 8 a.m. on Tuesday. Find the amount of parking fee that she had to pay.

(a)
Amount that Albert had to pay for 1 hour and 6 minutes
= 2.30 + 1.80
= $4.10

(b)
1 h = 60 min

From 2:15 p.m. to 3:15 p.m.: 1 h
Amount that Yen had to pay from 2:15 p.m. to 3:15 p.m = $2.30

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

6 h 45 min = 6 x 60 + 45 = 405 min

Number of sets of additional 30 minutes in 6 h 45 min
= 405 ÷ 30
= 13 r 15

Number of sets of additional 30 minutes that Yen had to pay for 
= 13 + 1
= 14

Amount that Yen had to pay for all the additional 30 minutes or part thereof for 6 h 45 min
= 14 x 1.80
= $25.20

From 10:00 p.m. to 6.30. a.m. 
Amount that Yen had to pay from 10:00 to 6.30 a.m. = $5

From 6.30 a.m. to 8 a.m.: 1 h 30 min

1 h 30 min = 1 x 60 + 30 = 90 min

Number of sets of additional 30 minutes in 1 h 30 min
= 90 ÷ 30
= 3

Amount that Yen had to pay for all the additional 30 minutes or part thereof for 1 h 30 min
= 3 x 1.80
= $5.40

Total amount that Yen had to pay
= 2.30 + 25.20 + 5 + 5.40
= $37.90

Answer(s): (a) $4.10; (b) $37.90