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 1.6 kg?
(a)
Postage cost of the parcel with a mass of 500 g
= 2.90 + 0.80
= $3.70
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 450 g = $2.90
Remaining mass
= 1600 - 450
= 1150 g
Number of sets of 50 g
= 1150 ÷ 50
= 23
Cost for remaining 1150 g
= 23 x 0.80
= $18.40
Postage cost of the parcel with a mass of 1.6 kg
= 18.40 + 2.90
= $21.30
Answer(s): (a) $3.70 (b) $21.30