The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 550 g?
- How much is the postage if a parcel has a mass of 2.3 kg?
(a)
Cost
= 3.30 + 0.60
= $3.90
(b)
1 kg = 1000 g
2.3 kg = 2.3 x 1000 = 2300 g
Cost for first 450 g = $3.30
Remaining mass
= 2300 - 450
= 1850 g
Number of sets of 100 g
= 1850 ÷ 100
= 18.5
Number of sets of 100 g to pay for
= 18 + 1
= 19
Cost for remaining 1850 g
= 19 x 0.60
= $11.40
Total cost
= 11.40 + 3.30
= $14.70
Answer(s): (a) $3.90; (b) $14.70