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.
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
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