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 |
$0.90 |
$0.80
|
Every additional 10 g or part thereof |
$0.45 |
How much did Lynn pay for the postage when she sent a letter which weighed 66 g and 8 postcards to Myanmar by airmail?
Remaining mass that Lynn had to pay for the letter as it was more than 30 g
= 66 - 30
= 36 g
Number of sets of additional 10 g of the letter that Lynn had to pay for
= 36 ÷ 10
= 3 r 6
Total number of sets of additional 10 g of the letter that Lynn had to pay for
= 3 + 1
= 4
Amount that Lynn had to pay for the sets of additional 10 g of the letter
= 4 x 0.45
= $1.80
Total amount that Lynn had to pay for the letter
= 0.90 + 1.80
= $2.70
Amount that Lynn had to pay for the 8 postcards
= 8 x 0.80
= $6.40
Total amount that Lynn paid
= 2.70 + 6.40
= $9.10
Answer(s): $9.10