The table shows the airmail rates for sending letters and postcards to some countries.
Destination |
Letters |
Postcards |
|
Mass |
Postage Rate |
Per piece |
Indonesia, Malaysia
|
1st 40 g |
$1.20 |
$0.50
|
Every additional 10 g or part thereof |
$0.40 |
How much did Jaslyn pay for the postage when she sent a letter which weighed 76 g and 9 postcards to Malaysia by airmail?
Remaining mass that Jaslyn had to pay for the letter as it was more than 40 g
= 76 - 40
= 36 g
Number of sets of additional 10 g of the letter that Jaslyn had to pay for
= 36 ÷ 10
= 3 r 6
Total number of sets of additional 10 g of the letter that Jaslyn had to pay for
= 3 + 1
= 4
Amount that Jaslyn had to pay for the sets of additional 10 g of the letter
= 4 x 0.40
= $1.60
Total amount that Jaslyn had to pay for the letter
= 1.20 + 1.60
= $2.80
Amount that Jaslyn had to pay for the 9 postcards
= 9 x 0.50
= $4.50
Total amount that Jaslyn paid
= 2.80 + 4.50
= $7.30
Answer(s): $7.30