Frederique works for a furniture retailer. The shop allows all employees to purchase 10 pieces of furniture per year at a discount. This year Frederique purchased eight pieces. She gave three pieces as a gift to her brother as a wedding present. Her employer's average gross profit percentage is 25 percent. Each piece was 20 percent off of normal retail prices and in all cases the employee price exceeded the employer's cost. What amount of the discount must be included in Frederique's income?