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 |
$0.60
|
Every additional 10 g or part thereof |
$0.20 |
How much did Natalie pay for the postage when she sent a letter which weighed 67 g and 6 postcards to Myanmar by airmail?
Remaining mass that Natalie had to pay for the letter as it was more than 40 g
= 67 - 40
= 27 g
Number of sets of additional 10 g of the letter that Natalie had to pay for
= 27 ÷ 10
= 2 r 7
Total number of sets of additional 10 g of the letter that Natalie had to pay for
= 2 + 1
= 3
Amount that Natalie had to pay for the sets of additional 10 g of the letter
= 3 x 0.20
= $0.60
Total amount that Natalie had to pay for the letter
= 1.20 + 0.60
= $1.80
Amount that Natalie had to pay for the 6 postcards
= 6 x 0.60
= $3.60
Total amount that Natalie paid
= 1.80 + 3.60
= $5.40
Answer(s): $5.40