P =1 − (1 + nr)−ntA(nr)
where A = 10025 × 4,570,000 = 1,142,500
where r = 1008.5 = 0.085
t = 20years
n = 12 months
P =1 − (1 + 120.085)−12×201,142,500(120.085)
P =1 − (0.1838)8,092.708
P = 9,915.10
The amount of interest paid on the loan over 20years will be ₱9,915.10
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