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The school store is running low on erasers for pencils. They want to order more, so they look at the prices for 4 brands.(4 points)

Determine the unit price of each brand. Round the price to the hundredths place. Remember to include the zero before the decimal.
Brand A: 20 for $2.50 = $
per eraser

Brand B: 35 for $3.25 = $
per eraser

Brand C: 50 for $5.25 = $
per eraser

Brand D: 100 for $10.00 = $
per eraser

Question 2
Which one is the best buy? The best buy will have the lowest cost per eraser.(1 point)
Responses

Brand A
Brand A

Brand B
Brand B

Brand C
Brand C

Brand D
Brand D

1 answer

To determine the unit price for each brand, we divide the total price by the number of erasers in each case.

Brand A: Price: $2.50 for 20 erasers
Unit price = Total Price / Number of Erasers = $2.50 / 20 = $0.125
Rounded to the hundredths place: $0.13

Brand B: Price: $3.25 for 35 erasers
Unit price = $3.25 / 35 = $0.092857...
Rounded to the hundredths place: $0.09

Brand C: Price: $5.25 for 50 erasers
Unit price = $5.25 / 50 = $0.105
Rounded to the hundredths place: $0.11

Brand D: Price: $10.00 for 100 erasers
Unit price = $10.00 / 100 = $0.10
Rounded to the hundredths place: $0.10

Now, let's summarize the unit prices:

  • Brand A: $0.13
  • Brand B: $0.09
  • Brand C: $0.11
  • Brand D: $0.10

Question 2: Which one is the best buy?
The best buy will have the lowest cost per eraser.

The lowest unit price is for Brand B at $0.09.

Best buy: Brand B