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 2.2 kg?
(a)
Cost
= 2.90 + 0.60
= $3.50
(b)
1 kg = 1000 g
2.2 kg = 2.2 x 1000 = 2200 g
Cost for first 550 g = $2.90
Remaining mass
= 2200 - 550
= 1650 g
Number of sets of 100 g
= 1650 ÷ 100
= 16.5
Number of sets of 100 g to pay for
= 16 + 1
= 17
Cost for remaining 1650 g
= 17 x 0.60
= $10.20
Total cost
= 10.20 + 2.90
= $13.10
Answer(s): (a) $3.50; (b) $13.10