Answer:
15104,994511758 average a year
Explanation:
1st year he has to pay 10500
2nd year 11025
3rd year 11576,25
4th year 12155,0625
5th year 12762,815625
6th year 13400,95640625
7th year 14071,004226562
8th year 14774,5543789
9th year 15513,2821597984
10th year 16288,946267773
11th year 17103,393581161
12th year 17958,563260219
13th year 18856,49142323
14th year 19799,315994391
15th year 20789,28179411
Simply adding a 5% rate to a previous year
In this way a total is
226574,91764658
Divided in number of years (15) gives an average of
15104,94511758 a year
