The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 850 g?
- How much is the postage if a parcel has a mass of 2.6 kg?
(a)
Cost
= 3.40 + 0.30
= $3.70
(b)
1 kg = 1000 g
2.6 kg = 2.6 x 1000 = 2600 g
Cost for first 750 g = $3.40
Remaining mass
= 2600 - 750
= 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 0.30
= $5.70
Total cost
= 5.70 + 3.40
= $9.10
Answer(s): (a) $3.70; (b) $9.10