Question 1075432
The fact that the amount changes each bounce makes it a geometric series.

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I am assuming no interest on the loan other than the 1% unpaid balance.
After 1 month $4750 +47.50=4797.50
after 2: 4547.50+45.48=4592.98
3:4342.98+43.43=4386.41
4:4136.41+41.36=4177.77
5:3927.77+39.28=3966.05
6:3716.05+37.16=3753.21
7:3503.21+35.03=3538.24
8:3288.24+32.88=3321.12
9:3071.12+30.71=3101.83
10:2751.83+27.52=2779.35
11:2529.35+25.29=2554.64
12:2304.64+23.05=2327.69
13:2077.69+20.79=2098.46
14:1848.96+18.49=1867.45
15:1617.45+16.17=1633.62
16:1383.62+13.84=1397.46
17:1147.96+11.48=1159.44
18:899.44+8.99=908.43
19:658.43+6.58=665.01
20:415.01+4.15=419.16
21:169.06+1.69=170.65
This is geometric series--rate of change is proportional to the amount, not fixed.
Interest over loan is 
$530.87