Question

1. What is the unit price for each detergent? Brand Size (oz) Price ($) Brand A: $ per ounce A 32 4.80 Brand B: $ per ounce B 48 5.76 Brand C: $ per ounce C с 128 17.92 2. Which detergent is the best buy?

Answer 1

To determine the unit price for each detergent, i.e. the price per ounce, you have to divide the cost of the detergent by the number of ounces the container has.

Detergent A

Has 32 ounces

Costs $4.80

The unit price can be calculated as:

$\frac{4.80}{32}=0.15$

Detergent A costs $0.15/ounce

Detergent B

Has 48 ounces

Costs $5.76

The unit price can be calculated as the quotient between the price and the amount of detergent:

$\frac{5.76}{48}=0.12$

Detergent B costs $0.12/ounce

Detergent C

Has 128ounces

Costs $17.90

Calculate the unit price by dividing the price by the number of ounces of the container:

$\frac{17.90}{128}=0.139\approx0.14$

Detergent C costs $0.14/ounce.

The best detergent to buy is the one that has the lower unit price, so to determine which one is it you have to compare their price per ounce.

In this case, detergent B has the lower price per ounce and thus it is the best detergent to buy.