Price of the items = $24000
Discounts =30%, 25%, 15%.
Sale amount after discount,
100 - 30 = 70% = 0.7
100 - 25 = 75% = 0.75
100 - 15 = 85% = 0.85
Multiplying we get the discount = 0.7 x0.75 x 0.85 = 0.44625
So the net price = 0.44625 x 24000 = $10,710