Investment calculator

p = input Starting amount

y = @(input After to years)

r = @(input Return rate to %) / 100

c = input Contribution

n = @(year / (input Contribution period))

fv = c * (((1 + r / n)^(n * y)  - 1) / (r / n)) * (1 + r / n)

pfv = p * (1 + r / n)^(n * y)

output result = fv + pfv

output total contributions = c * (n * y)

output total interest = result - (total contributions + p)

x = [0, y] i => (c * (((1 + r / n)^(n * i)  - 1) / (r / n)) * (1 + r / n) + p * (1 + r / n)^(n * i))

graph Value_through_years = x