in 2005 the cost of posting a letter was 28 cents. a company posted 120 letters and was given 4% discount on the cost. calculate the total discount
To calculate the total discount, we first need to find the cost of posting 120 letters without any discount.
The cost of posting 1 letter in 2005 was 28 cents.
So, the cost of posting 120 letters without any discount would be 120 * 28 cents = $<<120*28=3360>>3360.
Next, we need to find 4% of 3360 to calculate the amount of discount.
4% of 3360 is (4/100) * 3360 = 0.04 * 3360 = $<<0.04*3360=134.40>>134.40.
Therefore, the total discount given on posting 120 letters is $134.40.