The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 750 g?
- How much is the postage if a parcel has a mass of 1.3 kg?
(a)
Postage cost of the parcel with a mass of 750 g
= 3.50 + 0.30
= $3.80
(b)
1 kg = 1000 g
1.3 kg = 1.3 x 1000 = 1300 g
Cost for first 700 g = $3.50
Remaining mass
= 1300 - 700
= 600 g
Number of sets of 50 g
= 600 ÷ 50
= 12
Cost for remaining 600 g
= 12 x 0.30
= $3.60
Postage cost of the parcel with a mass of 1.3 kg
= 3.60 + 3.50
= $7.10
Answer(s): (a) $3.80 (b) $7.10