The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 800 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 800 g
= 2.10 + 0.50
= $2.60
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 750 g = $2.10
Remaining mass
= 1600 - 750
= 850 g
Number of sets of 50 g
= 850 ÷ 50
= 17
Cost for remaining 850 g
= 17 x 0.50
= $8.50
Postage cost of the parcel with a mass of 1.6 kg
= 8.50 + 2.10
= $10.60
Answer(s): (a) $2.60 (b) $10.60