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 20 g |
$1.50 |
$0.60
|
Every additional 10 g or part thereof |
$0.40 |
How much did Cindy pay for the postage when she sent a letter which weighed 94 g and 4 postcards to Malaysia by airmail?
Remaining mass that Cindy had to pay for the letter as it was more than 20 g
= 94 - 20
= 74 g
Number of sets of additional 10 g of the letter that Cindy had to pay for
= 74 ÷ 10
= 7 r 4
Total number of sets of additional 10 g of the letter that Cindy had to pay for
= 7 + 1
= 8
Amount that Cindy had to pay for the sets of additional 10 g of the letter
= 8 x 0.40
= $3.20
Total amount that Cindy had to pay for the letter
= 1.50 + 3.20
= $4.70
Amount that Cindy had to pay for the 4 postcards
= 4 x 0.60
= $2.40
Total amount that Cindy paid
= 4.70 + 2.40
= $7.10
Answer(s): $7.10