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 1.6 kg?
(a)
Postage cost of the parcel with a mass of 500 g
= 2.90 + 0.30
= $3.20
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 400 g = $2.90
Remaining mass
= 1600 - 400
= 1200 g
Number of sets of 100 g
= 1200 ÷ 100
= 12
Cost for remaining 1200 g
= 12 x 0.30
= $3.60
Postage cost of the parcel with a mass of 1.6 kg
= 3.60 + 2.90
= $6.50
Answer(s): (a) $3.20 (b) $6.50