The table shows the airmail rates for sending letters and postcards to some countries.
Destination |
Letters |
Postcards |
|
Mass |
Postage Rate |
Per piece |
Thailand, Vietnam, Myanmar
|
1st 40 g |
$1.20 |
$0.80
|
Every additional 10 g or part thereof |
$0.25 |
How much did Min pay for the postage when she sent a letter which weighed 62 g and 2 postcards to Thailand by airmail?
Remaining mass that Min had to pay for the letter as it was more than 40 g
= 62 - 40
= 22 g
Number of sets of additional 10 g of the letter that Min had to pay for
= 22 ÷ 10
= 2 r 2
Total number of sets of additional 10 g of the letter that Min had to pay for
= 2 + 1
= 3
Amount that Min had to pay for the sets of additional 10 g of the letter
= 3 x 0.25
= $0.75
Total amount that Min had to pay for the letter
= 1.20 + 0.75
= $1.95
Amount that Min had to pay for the 2 postcards
= 2 x 0.80
= $1.60
Total amount that Min paid
= 1.95 + 1.60
= $3.55
Answer(s): $3.55