At the office supply store, a box of 25 pens costs $7.19, a box of 50 pens costs $10.78, a box of 75 pens costs $14.53, a box of 100 pens costs $22.50, and a box of 125 pens costs $26.25.
What is the cost per pen?
The cost per pen is $0.29.
To find the cost per pen for each box size, divide the total cost by the number of pens.
For a box of 25 pens:
Cost per pen = $7.19 / 25 pens = $0.2876 ≈ $0.29
For a box of 50 pens:
Cost per pen = $10.78 / 50 pens = $0.2156 ≈ $0.22
For a box of 75 pens:
Cost per pen = $14.53 / 75 pens = $0.1937 ≈ $0.19
For a box of 100 pens:
Cost per pen = $22.50 / 100 pens = $0.225
For a box of 125 pens:
Cost per pen = $26.25 / 125 pens = $0.21