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 1.2 kg?
(a)
Postage cost of the parcel with a mass of 850 g
= 3.55 + 0.80
= $4.35
(b)
1 kg = 1000 g
1.2 kg = 1.2 x 1000 = 1200 g
Cost for first 800 g = $3.55
Remaining mass
= 1200 - 800
= 400 g
Number of sets of 50 g
= 400 ÷ 50
= 8
Cost for remaining 400 g
= 8 x 0.80
= $6.40
Postage cost of the parcel with a mass of 1.2 kg
= 6.40 + 3.55
= $9.95
Answer(s): (a) $4.35 (b) $9.95