The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 g?
- How much is the postage if a parcel has a mass of 2.6 kg?
(a)
Postage cost of the parcel with a mass of 600 g
= 3.70 + 0.40
= $4.10
(b)
1 kg = 1000 g
2.6 kg = 2.6 x 1000 = 2600 g
Cost for first 550 g = $3.70
Remaining mass
= 2600 - 550
= 2050 g
Number of sets of 50 g
= 2050 ÷ 50
= 41
Cost for remaining 2050 g
= 41 x 0.40
= $16.40
Postage cost of the parcel with a mass of 2.6 kg
= 16.40 + 3.70
= $20.10
Answer(s): (a) $4.10 (b) $20.10