Capital recover cost

$F = P(1 + i)^n$

$F = 100,000(1 + 0.10)^{15}$

$F = \$417,724.82$
 

$R = 417,724.82 - 0.20(100,000)$

$R = \$397,724.82$
 

$A = \dfrac{Ri}{(1 + i)^n - 1}$

$A = \dfrac{397,724.82(0.10)}{(1 + 0.10)^{15} - 1}$

$A = \$12,518$