Question 1194896
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Calculations in the post by @ElectricPavlov are incorrect.


For example, he calculates  1.155^2.2986 and gets approximately 1.404,
which leads him to the answer 14,040.


Correct calculation is 1.155^2.2986 = 1.39267875, giving the final answer 13,926.79.


So, the answer R14,040 in the post by @ElectricPavlov is incorrect.



Also, from the problem, it is unclear, if the interest is simple or compounded,
so, the problem itself is dark and its meaning is unclear.


As the problem is worded and presented in the post, it is as far from to be 
a true Math problem as the ground is far from the heaven.