A. There are three different sized packages of lunch bags. The 25-bag package is $1.50. The 75-bag package is $3.00. The 125- bag package is $3.75. What is the unit price of each? Which box is the best buy?
ANSWER: The unit price of each package is:
- $1.50/25 = $.06 per bag
- $3.00/75 = $.04 per bag
- $3.75/125 = $.03 per bag
The best buy is the 125-bag package. Each bag costs 3 cents.
B. The price of the gasoline is 45 cents per liter. You pump 38 liters of gasoline into your car. You pay with a credit card. What is the price of your gasoline?
ANSWER: $17.10 (45 cents X 38 liters -- $17.10. No cash discount)
1. You need to buy 3 yards of rope. The hardware store sells the rope for $2.50 per yard. What is the cost?
ANSWER: $ 7.50 (3 yards X $ 2.50 = $ 7.50)
2. You go to the supermarket to buy dog food. The 10-pound bag costs $6.90. The 4-pound bag is marked $4.40. Which is the better buy?
ANSWER: The 10-pound bag which costs 69 cents per pound.
($6.90/10 = $ .69 per pound; $4.40/4 -- $1.10 per pound)
3. You buy 15 gallons of gasoline at $1.39 per gallon. There is a 4 cent per gallon cash discount. What should you pay if you use a credit card? What should you pay if you use cash?
ANSWER: If you use a credit card, you should pay $20.85 (15 gallons X $1.39 -- $20.85)
If you use cash, you should pay $20.25
(15 gallons X $.04 -- $.60 discount) ($20.85 - $.60 = $20.25)
4. You have 350 gallons of heating oil delivered to your home. What should you look for on the delivery ticket?
ANSWER: The seller's name and address; your name and address; the delivery date; the amount sold (350 gallons); the type of fuel (home heating oil); the unit price.