Compound interest formula
A = P (1 + r/n) ^ nt
Where:
A = future value
P = principal = 749,791
r = interest rate = 9.5% / 100 = 0.095 (decimal form)
n= number of compounding periods per year = 12
t = years = 13
Replacing:
A = 749,791 ( 1 + 0.095/12)^12*13
A= $2,565,558.848
Interest :
A - P = 2,565,558.848 - 749,791 =$ 1,815,767.848