8.05 Best buys
A carton of 10 eggs cost \$6.50. Calculate the cost of 1 egg in cents.
A 1.35\text{ kg} packet of mince costs \$15. How many grams of mince does each dollar buy?
A 0.75\text{ L} bottle of milk costs \$1.05. Calculate the cost of milk per litre.
Sally is deciding which of two different cereals she should buy.
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Chocon Pops costs \$0.84 for 200\text{ g}.
Special Q costs \$0.36 for 100\text{ g}.
Calculate the cost per kilogram of Choco Pops.
Calculate the cost per kilogram of Special Q.
Which of the cereal brands is cheaper to buy?
A supermarket sells two different brands of eggs, Happy Hens and Sunny Side Up.
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Happy Hens eggs cost \$6.00 for 12 eggs.
Sunny Side Up eggs cost \$1.50 for 5 eggs.
Calculate the cost in cents per egg from Happy Hens.
Calculate the cost in cents per egg from Sunny Side Up.
Which brand sells its eggs at a cheaper price?
Consider the following scenarios:
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At Emporio, durian is sold for 76 cents per kilogram.
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At Greenery, each 5.5\text{ kg} durian is sold for \$2.97.
Calculate the price of 5.5\text{ kg} of durian purchased from Emporio.
How much do durians cost per kilogram at Greenery?
Which store is the best buy?
Iain feels like buying some ice-cream for himself and his friends.
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A box of 8 Cornettos costs \$18.00.
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A box of 5 Magnums costs \$7.25.
Calculate the cost of a Cornetto.
Calculate the cost of a Magnum.
Which type of ice-cream is cheaper individually?
Isabelle is buying juice for her nephew's birthday party.
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A 3.2\text{ L} bottle of apple juice costs \$13.76.
A 2.1\text{ L} bottle of orange juice costs \$6.30.
Calculate the cost per litre of an apple juice.
Calculate the cost per litre of an orange juice.
Which juice is the best buy?
Lisa has never made a potato salad before and wants to try making one. She has to choose between two types of potatoes at the store.
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A 10.275\text{ kg} sack of sebago potatoes costs \$13.70.
A 7.7\text{ kg} sack of russet potatoes costs \$14.00.
How many kilograms of sebago potatoes does \$1 buy?
How many kilograms of russet potatoes does \$1 buy?
Which type of potato is the best buy?
Consider the following scenarios:
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Han paid \$124.62 for 67\text{ L} of petrol in Humbleton.
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Amelia paid \$82.08 for 57\text{ L} of petrol in Dunkilderry.
Calculate the cost per litre of petrol in Humbleton.
Calculate the cost per litre of petrol in Dunkilderry.
In which suburb is petrol cheaper?
Han buys 30\text{ L} in Statesota, and this petrol station matched the best price between Humbleton and Dunkilderry. How much did he pay?
Fiona wants to buy some salmon from Whole-sail Seafood.
A 1.9\text{ kg} Atlantic salmon costs \$31.35.
A 2\text{ kg} Tasmanian salmon costs \$51.00.
Calculate the cost per kilogram of Atlantic salmon.
Calculate the cost per kilogram of Tasmanian salmon.
Which type of salmon is the best buy?
Consider the following scenarios:
A 200\text{ m}^2 apartment is sold for \$440\,000.
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An adjacent apartment that is 220\text{ m}^2 in size is sold for \$440\,000.
How much per square metre did the first apartment sell for?
How much per square metre did the second apartment sell for?
Which apartment is the best value per square metre?
You want to buy 21 backpacks. Consider the following scenarios:
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Barry's Bargain Bins sells backpacks for \$5.00 each, and if you buy 5 backpacks the 6th is free.
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Lucie's Low Price Supplies sells backpacks for \$6.50 each, and if you buy 6 backpacks the 7th is free.
How many free backpacks do you get at the following stores?
Barry's Bargain Bins
Lucie's Low Price Supplies
How much would you spend at the following stores?
Barry's Bargain Bins
Lucie's Low Price Supplies
In which store would it be cheaper to buy 21 backpacks?
Two similar quality clothes dryers both originally cost \$2799.
The first clothes dryer is discounted by 11\%. Calculate the new price.
The second clothes dryer is discounted by 5\%, and then by a further 6\% after that. Calculate the new price.
Which clothes dryer is the best buy?