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 2.3 kg?
(a)
Postage cost of the parcel with a mass of 500 g
= 3.70 + 0.60
= $4.30
(b)
1 kg = 1000 g
2.3 kg = 2.3 x 1000 = 2300 g
Cost for first 400 g = $3.70
Remaining mass
= 2300 - 400
= 1900 g
Number of sets of 100 g
= 1900 ÷ 100
= 19
Cost for remaining 1900 g
= 19 x 0.60
= $11.40
Postage cost of the parcel with a mass of 2.3 kg
= 11.40 + 3.70
= $15.10
Answer(s): (a) $4.30 (b) $15.10