Mathematics
Grade 8
15 min
Price lists
Price lists
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Accurately interpret information presented in various price list formats.
Calculate the total cost of multiple items from a price list, including different quantities.
Determine the unit price of items to compare value and identify the best deals.
Apply discounts and sales tax percentages to items from a price list to find the final cost.
Solve multi-step word problems involving price lists, quantities, discounts, and sales tax.
Make informed purchasing decisions based on price list analysis.
Ever wonder how much you'd spend if you bought all your favorite snacks at once? 🛒 Understanding price lists helps you become a super smart shopper!
In this lesson, you'll learn how to read, interpret, and use price lists to calculate costs, compare deals...
2
Key Concepts & Vocabulary
TermDefinitionExample
Price ListA document or display that shows the prices of goods or services offered for sale.A menu at a restaurant or a catalog showing prices for electronics.
Unit PriceThe cost of a single item or a standard unit of measure (e.g., per ounce, per pound, per item). It helps compare different sizes or brands.If a 6-pack of soda costs $3.00, the unit price is $0.50 per can.
QuantityThe number of specific items being purchased.If you buy 3 apples, the quantity is 3.
Total CostThe sum of the prices of all items purchased, often including any applicable taxes or discounts.Buying 2 notebooks at $2 each results in a total cost of $4 (before tax).
DiscountA reduction in the original price of an item, usually expressed as a percentage or a fixed amount.A shirt originally pric...
3
Core Formulas
Calculating Total Cost (without tax/discount)
$$ \text{Total Cost} = \sum (\text{Quantity}_i \times \text{Unit Price}_i) $$
To find the total cost of multiple items, multiply the quantity of each item by its unit price, and then add all these products together. The summation symbol ($\sum$) means to add up all the individual (Quantity * Unit Price) calculations.
Calculating Unit Price
$$ \text{Unit Price} = \frac{\text{Total Price of Pack/Bundle}}{\text{Number of Units in Pack/Bundle}} $$
Use this rule to determine the cost per single item when items are sold in packs or bundles. This is crucial for comparing different package sizes to find the best value.
Calculating Cost with Discount
$$ \text{Cost with Discount} = \text{Original Price} \times (1 - \frac{\text{Discou...
5 more steps in this tutorial
Sign up free to access the complete tutorial with worked examples and practice.
Sign Up Free to ContinueSample Practice Questions
Challenging
At a school store, the price list shows that 2 pens and 1 notebook cost $5.00, while 1 pen and 2 notebooks cost $7.00. What is the price of a single pen?
A.$1.00
B.$2.00
C.$3.00
D.$4.00
Challenging
You have a $25 budget for the cafe (Muffin: $3.00, Sandwich: $7.50). You must buy one sandwich. With the remaining money, what is the maximum number of muffins you can buy if a 10% sales tax is applied to your entire purchase?
A.4 muffins
B.5 muffins
C.6 muffins
D.7 muffins
Challenging
A tech store sells a keyboard for $60. Store A offers a 10% discount, then adds 5% sales tax. Store B sells it for $58, offers no discount, but adds 8% sales tax. Which store has the better final price?
A.Store A is cheaper by $6.02
B.Store B is cheaper by $1.06
C.Store A is cheaper by $1.06
D.Both stores have the same final price.
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing Free