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 2.4 kg?
(a)
Postage cost of the parcel with a mass of 800 g
= 3.80 + 0.60
= $4.40
(b)
1 kg = 1000 g
2.4 kg = 2.4 x 1000 = 2400 g
Cost for first 750 g = $3.80
Remaining mass
= 2400 - 750
= 1650 g
Number of sets of 50 g
= 1650 ÷ 50
= 33
Cost for remaining 1650 g
= 33 x 0.60
= $19.80
Postage cost of the parcel with a mass of 2.4 kg
= 19.80 + 3.80
= $23.60
Answer(s): (a) $4.40 (b) $23.60