The table shows the airmail rates for sending letters and postcards to some countries.
Destination |
Letters |
Postcards |
|
Mass |
Postage Rate |
Per piece |
New Zealand, Australia
|
1st 30 g |
$1.70 |
$0.80
|
Every additional 10 g or part thereof |
$0.45 |
How much did Pamela pay for the postage when she sent a letter which weighed 69 g and 8 postcards to New Zealand by airmail?
Remaining mass that Pamela had to pay for the letter as it was more than 30 g
= 69 - 30
= 39 g
Number of sets of additional 10 g of the letter that Pamela had to pay for
= 39 ÷ 10
= 3 r 9
Total number of sets of additional 10 g of the letter that Pamela had to pay for
= 3 + 1
= 4
Amount that Pamela had to pay for the sets of additional 10 g of the letter
= 4 x 0.45
= $1.80
Total amount that Pamela had to pay for the letter
= 1.70 + 1.80
= $3.50
Amount that Pamela had to pay for the 8 postcards
= 8 x 0.80
= $6.40
Total amount that Pamela paid
= 3.50 + 6.40
= $9.90
Answer(s): $9.90