Independent solution

How to solve this Growing Perpetuity-Due under a Force of Interest question

Setup

Setup

Convert the constant annual force to an annual effective yield.

i=e0.121=0.12749685i=e^{0.12}-1=0.12749685

Model

Model

For a growing perpetuity-due, the time-zero payment advances the usual immediate formula by one period.

P=3,0001+ii0.07P=3{,}000\frac{1+i}{i-0.07}

Compute

Compute

Substitute the effective yield and growth rate.

P=3,0001.127496850.127496850.07=58,829.1439P=3{,}000\frac{1.12749685}{0.12749685-0.07}=58{,}829.1439

Answer

Answer

The purchase price rounds to 58829, choice C.

P58,829(C)\boxed{P\approx58{,}829\quad\text{(C)}}