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 |
$0.70
|
Every additional 10 g or part thereof |
$0.25 |
How much did Roshel pay for the postage when she sent a letter which weighed 93 g and 8 postcards to New Zealand by airmail?
Remaining mass that Roshel had to pay for the letter as it was more than 30 g
= 93 - 30
= 63 g
Number of sets of additional 10 g of the letter that Roshel had to pay for
= 63 ÷ 10
= 6 r 3
Total number of sets of additional 10 g of the letter that Roshel had to pay for
= 6 + 1
= 7
Amount that Roshel had to pay for the sets of additional 10 g of the letter
= 7 x 0.25
= $1.75
Total amount that Roshel had to pay for the letter
= 1.70 + 1.75
= $3.45
Amount that Roshel had to pay for the 8 postcards
= 8 x 0.70
= $5.60
Total amount that Roshel paid
= 3.45 + 5.60
= $9.05
Answer(s): $9.05