can anyone please explain how is activity components costs per unit (part 2 of solution found) The solution is there but the method is not known please help!

ordering Set-up Handling Total Number Cost per unit X ($) Z3 ($) 1,000 W4 (3) 4,000 5,000 10,000 5,000 7,500 15,000 12,500 9,000 9,000 18,000 18,000 15.000 20.500 38,000 40.500 2,000 800 3,200 4,000 7.5 25.625 11.875 10.125 The activity components costs per unit are as follows: X ($) Y2 ($) Z3 ($) 1.5625 Ordering 0.5 5 4.6875 9.375 2.5 Set-up 5.625 11.25 Handling 4.5 11.875 25.625 7.5 Total of units Y2 ($) 20,000 40,000 54,000 114,000 W4 ($) 2.5 3-125 4.5 10.125 ordering Set-up Handling Total Number Cost per unit X ($) Z3 ($) 1,000 W4 (3) 4,000 5,000 10,000 5,000 7,500 15,000 12,500 9,000 9,000 18,000 18,000 15.000 20.500 38,000 40.500 2,000 800 3,200 4,000 7.5 25.625 11.875 10.125 The activity components costs per unit are as follows: X ($) Y2 ($) Z3 ($) 1.5625 Ordering 0.5 5 4.6875 9.375 2.5 Set-up 5.625 11.25 Handling 4.5 11.875 25.625 7.5 Total of units Y2 ($) 20,000 40,000 54,000 114,000 W4 ($) 2.5 3-125 4.5 10.125