Question

$300,000 accumulated in 30 years @12% compounded annually. What would the sinking payment be?

Answer 1

amount = payment ( (1+i)^n - 1 )/i

sub in your values and solve for 'payment'

300000 = payment (1.12^30 - 1)/.12

Answer 2

2% on sale 60,000 4% on sale
60,000

sale 106,000