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 2.1 kg?
(a)
Postage cost of the parcel with a mass of 800 g
= 3.50 + 0.80
= $4.30
(b)
1 kg = 1000 g
2.1 kg = 2.1 x 1000 = 2100 g
Cost for first 700 g = $3.50
Remaining mass
= 2100 - 700
= 1400 g
Number of sets of 100 g
= 1400 ÷ 100
= 14
Cost for remaining 1400 g
= 14 x 0.80
= $11.20
Postage cost of the parcel with a mass of 2.1 kg
= 11.20 + 3.50
= $14.70
Answer(s): (a) $4.30 (b) $14.70