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 30 g |
$1.40 |
$0.70
|
Every additional 10 g or part thereof |
$0.45 |
How much did Olivia pay for the postage when she sent a letter which weighed 63 g and 6 postcards to Myanmar by airmail?
Remaining mass that Olivia had to pay for the letter as it was more than 30 g
= 63 - 30
= 33 g
Number of sets of additional 10 g of the letter that Olivia had to pay for
= 33 ÷ 10
= 3 r 3
Total number of sets of additional 10 g of the letter that Olivia had to pay for
= 3 + 1
= 4
Amount that Olivia had to pay for the sets of additional 10 g of the letter
= 4 x 0.45
= $1.80
Total amount that Olivia had to pay for the letter
= 1.40 + 1.80
= $3.20
Amount that Olivia had to pay for the 6 postcards
= 6 x 0.70
= $4.20
Total amount that Olivia paid
= 3.20 + 4.20
= $7.40
Answer(s): $7.40