after the price increase to 35cents the cost of the company of posting 1200 letters was dollars 399. calculate the percentage discount that the company was given in 2006

In order to calculate the percentage discount, we need to know the original cost of posting 1200 letters before the price increase.

Let's assume the original cost per letter was x dollars.

Before the price increase, the total cost of posting 1200 letters would be:
Total cost = (Original cost per letter) x (Number of letters)
Total cost = x * 1200

After the price increase, the total cost of posting 1200 letters is given as 399 dollars.

We can now set up an equation using the information given:
399 = 0.35 * 1200

Simplifying the equation:
399 = 420

This means that the equation is not solvable without additional information.