Let the amount be x.
6% for the first 160000
= 6/100 * 160000 = 9600
4% for any amount exceeding 160000.
= 4/100 * (x -160000) = 0.04(x-160000)
The sum of both commission should be equal to 10560.
9600 + 0.04(x -160000) = 10560
0.04(x -160000) = 10560 - 9600
0.04(x -160000) = 960 Divide by 0.04.
(x -160000) = 960/0.04
(x -160000) = 24000
x = 24000 + 160000 = 184000.
Selling price = 184000