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 |
$1.50 |
$0.70
|
Every additional 10 g or part thereof |
$0.40 |
How much did Tammy pay for the postage when she sent a letter which weighed 98 g and 2 postcards to Myanmar by airmail?
Remaining mass that Tammy had to pay for the letter as it was more than 40 g
= 98 - 40
= 58 g
Number of sets of additional 10 g of the letter that Tammy had to pay for
= 58 ÷ 10
= 5 r 8
Total number of sets of additional 10 g of the letter that Tammy had to pay for
= 5 + 1
= 6
Amount that Tammy had to pay for the sets of additional 10 g of the letter
= 6 x 0.40
= $2.40
Total amount that Tammy had to pay for the letter
= 1.50 + 2.40
= $3.90
Amount that Tammy had to pay for the 2 postcards
= 2 x 0.70
= $1.40
Total amount that Tammy paid
= 3.90 + 1.40
= $5.30
Answer(s): $5.30