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 |
$1.30 |
$0.70
|
Every additional 10 g or part thereof |
$0.35 |
How much did Tammy pay for the postage when she sent a letter which weighed 82 g and 8 postcards to Myanmar by airmail?
Remaining mass that Tammy had to pay for the letter as it was more than 40 g
= 82 - 40
= 42 g
Number of sets of additional 10 g of the letter that Tammy had to pay for
= 42 ÷ 10
= 4 r 2
Total number of sets of additional 10 g of the letter that Tammy had to pay for
= 4 + 1
= 5
Amount that Tammy had to pay for the sets of additional 10 g of the letter
= 5 x 0.35
= $1.75
Total amount that Tammy had to pay for the letter
= 1.30 + 1.75
= $3.05
Amount that Tammy had to pay for the 8 postcards
= 8 x 0.70
= $5.60
Total amount that Tammy paid
= 3.05 + 5.60
= $8.65
Answer(s): $8.65