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 1.5 kg?
(a)
Postage cost of the parcel with a mass of 650 g
= 3.30 + 0.30
= $3.60
(b)
1 kg = 1000 g
1.5 kg = 1.5 x 1000 = 1500 g
Cost for first 600 g = $3.30
Remaining mass
= 1500 - 600
= 900 g
Number of sets of 50 g
= 900 ÷ 50
= 18
Cost for remaining 900 g
= 18 x 0.30
= $5.40
Postage cost of the parcel with a mass of 1.5 kg
= 5.40 + 3.30
= $8.70
Answer(s): (a) $3.60 (b) $8.70