The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 g?
- How much is the postage if a parcel has a mass of 1.3 kg?
(a)
Postage cost of the parcel with a mass of 600 g
= 3.50 + 0.40
= $3.90
(b)
1 kg = 1000 g
1.3 kg = 1.3 x 1000 = 1300 g
Cost for first 500 g = $3.50
Remaining mass
= 1300 - 500
= 800 g
Number of sets of 100 g
= 800 ÷ 100
= 8
Cost for remaining 800 g
= 8 x 0.40
= $3.20
Postage cost of the parcel with a mass of 1.3 kg
= 3.20 + 3.50
= $6.70
Answer(s): (a) $3.90 (b) $6.70