The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 500 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 500 g
= 3.90 + 0.60
= $4.50
(b)
1 kg = 1000 g
1.3 kg = 1.3 x 1000 = 1300 g
Cost for first 450 g = $3.90
Remaining mass
= 1300 - 450
= 850 g
Number of sets of 50 g
= 850 ÷ 50
= 17
Cost for remaining 850 g
= 17 x 0.60
= $10.20
Postage cost of the parcel with a mass of 1.3 kg
= 10.20 + 3.90
= $14.10
Answer(s): (a) $4.50 (b) $14.10