The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 850 g?
- How much is the postage if a parcel has a mass of 1.5 kg?
(a)
Postage cost of the parcel with a mass of 850 g
= 2.20 + 0.60
= $2.80
(b)
1 kg = 1000 g
1.5 kg = 1.5 x 1000 = 1500 g
Cost for first 800 g = $2.20
Remaining mass
= 1500 - 800
= 700 g
Number of sets of 50 g
= 700 ÷ 50
= 14
Cost for remaining 700 g
= 14 x 0.60
= $8.40
Postage cost of the parcel with a mass of 1.5 kg
= 8.40 + 2.20
= $10.60
Answer(s): (a) $2.80 (b) $10.60