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 1.9 kg?
(a)
Postage cost of the parcel with a mass of 850 g
= 2.90 + 0.30
= $3.20
(b)
1 kg = 1000 g
1.9 kg = 1.9 x 1000 = 1900 g
Cost for first 800 g = $2.90
Remaining mass
= 1900 - 800
= 1100 g
Number of sets of 50 g
= 1100 ÷ 50
= 22
Cost for remaining 1100 g
= 22 x 0.30
= $6.60
Postage cost of the parcel with a mass of 1.9 kg
= 6.60 + 2.90
= $9.50
Answer(s): (a) $3.20 (b) $9.50