Final answer:
The price of each pen is $0.25 (25 cents) and the price of each pencil is $0.50 (50 cents).
Step-by-step explanation:
To find the price of pens and pencils at each company, we can set up a system of equations using the given information. Let's denote the price of a pen as 'p' and the price of a pencil as 'c'.
From the first company, Acme Wholesale, we know that 100p + 200c = 125.
From the second company, Grant Supply Company, we know that 500p + 200c = 425.
Solving this system of equations will give us the values of 'p' and 'c', which represent the price of a pen and a pencil, respectively.
p = $0.25 (25 cents)
c = $0.50 (50 cents)