The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 900 g?
- How much is the postage if a parcel has a mass of 1.2 kg?
(a)
Postage cost of the parcel with a mass of 900 g
= 3.30 + 0.60
= $3.90
(b)
1 kg = 1000 g
1.2 kg = 1.2 x 1000 = 1200 g
Cost for first 850 g = $3.30
Remaining mass
= 1200 - 850
= 350 g
Number of sets of 50 g
= 350 ÷ 50
= 7
Cost for remaining 350 g
= 7 x 0.60
= $4.20
Postage cost of the parcel with a mass of 1.2 kg
= 4.20 + 3.30
= $7.50
Answer(s): (a) $3.90 (b) $7.50