The table shows the parking fees at a car park.

Time	Charges
First 1 hour or less	$2.80
Every additional 30 minutes or part thereof	$2.20
Overnight parking from 10 p.m. to 6:30 a.m.	$12

1. Wesley parked his car at the carpark at 11.00 a.m. for 1 hour and 37 minutes. How much did he have to pay?
2. Natalie parked her car at the car park from 7:35 p.m. on Monday to 11 a.m. on Tuesday. Find the amount of parking fee that she had to pay.

(a)
Amount that Wesley had to pay for 1 hour and 37 minutes
= 2.80 + 2.20 + 2.20
= $7.20

(b)
1 h = 60 min

From 7:35 p.m. to 8:35 p.m.: 1 h
Amount that Natalie had to pay from 7:35 p.m. to 8:35 p.m = $2.80

From 8:35 p.m. to 10:00 p.m.: 1 h 25 min

1 h 25 min = 1 x 60 + 25 = 85 min

Number of sets of additional 30 minutes in 1 h 25 min
= 85 ÷ 30
= 2 r 25

Number of sets of additional 30 minutes that Natalie had to pay for 
= 2 + 1
= 3

Amount that Natalie had to pay for all the additional 30 minutes or part thereof for 1 h 25 min
= 3 x 2.20
= $6.60

From 10:00 p.m. to 6.30. a.m. 
Amount that Natalie had to pay from 10:00 to 6.30 a.m. = $12

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 Natalie had to pay for all the additional 30 minutes or part thereof for 4 h 30 min
= 9 x 2.20
= $19.80

Total amount that Natalie had to pay
= 2.80 + 6.60 + 12 + 19.80
= $41.20

Answer(s): (a) $7.20; (b) $41.20