The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 650 g?
- How much is the postage if a parcel has a mass of 1.7 kg?
(a)
Postage cost of the parcel with a mass of 650 g
= 2.45 + 0.30
= $2.75
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 600 g = $2.45
Remaining mass
= 1700 - 600
= 1100 g
Number of sets of 50 g
= 1100 ÷ 50
= 22
Cost for remaining 1100 g
= 22 x 0.30
= $6.60
Postage cost of the parcel with a mass of 1.7 kg
= 6.60 + 2.45
= $9.05
Answer(s): (a) $2.75 (b) $9.05