The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 950 g?
- How much is the postage if a parcel has a mass of 2.2 kg?
(a)
Cost
= 3.30 + 0.20
= $3.50
(b)
1 kg = 1000 g
2.2 kg = 2.2 x 1000 = 2200 g
Cost for first 850 g = $3.30
Remaining mass
= 2200 - 850
= 1350 g
Number of sets of 100 g
= 1350 ÷ 100
= 13.5
Number of sets of 100 g to pay for
= 13 + 1
= 14
Cost for remaining 1350 g
= 14 x 0.20
= $2.80
Total cost
= 2.80 + 3.30
= $6.10
Answer(s): (a) $3.50; (b) $6.10