Explain how you can compare the cost of two items that are different sizes.

1 answer

Comparing the cost of two items that are different sizes can be done effectively by using a method called "unit pricing." Unit pricing allows you to express the price of each item in a consistent manner, typically per unit of measurement (like weight, volume, quantity, etc.). Here’s how you can do it:

  1. Identify the Size and Price: First, note the size (e.g., weight in pounds or volume in liters) and the total price of each item. For example, Item A could be a 2-pound bag of flour costing $4.00, and Item B could be a 5-pound bag of flour costing $8.00.

  2. Calculate the Unit Price: To find the cost per unit of measurement, divide the total price by the size of the item.

    • For Item A: \[ \text{Unit Price A} = \frac{\text{Price A}}{\text{Size A}} = \frac{4.00}{2} = 2.00 \text{ (per pound)} \]
    • For Item B: \[ \text{Unit Price B} = \frac{\text{Price B}}{\text{Size B}} = \frac{8.00}{5} = 1.60 \text{ (per pound)} \]
  3. Compare the Unit Prices: Now that you have the unit prices, you can easily compare them.

    • In this case, Item A costs $2.00 per pound, while Item B costs $1.60 per pound.
  4. Determine the Better Value: The item with the lower unit price is the better value for your purchase. Here, Item B offers a lower price per pound, so it is more cost-effective.

  5. Consider Additional Factors: If applicable, also consider other factors like quality, brand, and any promotions that might affect the overall value or preference for one item over the other.

By following these steps, you can make an informed decision when comparing items of different sizes and ensure you get the best value for your money.