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 |
$1.30 |
$0.80
|
Every additional 10 g or part thereof |
$0.45 |
How much did Marion pay for the postage when she sent a letter which weighed 96 g and 8 postcards to Vietnam by airmail?
Remaining mass that Marion had to pay for the letter as it was more than 20 g
= 96 - 20
= 76 g
Number of sets of additional 10 g of the letter that Marion had to pay for
= 76 ÷ 10
= 7 r 6
Total number of sets of additional 10 g of the letter that Marion had to pay for
= 7 + 1
= 8
Amount that Marion had to pay for the sets of additional 10 g of the letter
= 8 x 0.45
= $3.60
Total amount that Marion had to pay for the letter
= 1.30 + 3.60
= $4.90
Amount that Marion had to pay for the 8 postcards
= 8 x 0.80
= $6.40
Total amount that Marion paid
= 4.90 + 6.40
= $11.30
Answer(s): $11.30