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 20 g |
$1.70 |
$0.80
|
Every additional 10 g or part thereof |
$0.40 |
How much did Jade pay for the postage when she sent a letter which weighed 44 g and 6 postcards to Myanmar by airmail?
Remaining mass that Jade had to pay for the letter as it was more than 20 g
= 44 - 20
= 24 g
Number of sets of additional 10 g of the letter that Jade had to pay for
= 24 ÷ 10
= 2 r 4
Total number of sets of additional 10 g of the letter that Jade had to pay for
= 2 + 1
= 3
Amount that Jade had to pay for the sets of additional 10 g of the letter
= 3 x 0.40
= $1.20
Total amount that Jade had to pay for the letter
= 1.70 + 1.20
= $2.90
Amount that Jade had to pay for the 6 postcards
= 6 x 0.80
= $4.80
Total amount that Jade paid
= 2.90 + 4.80
= $7.70
Answer(s): $7.70