Question

I could really use some help with this problem.

Joe bought 100 shares of stock at $10.00 per share. When the shares increased to a value of $N each, he made a charitable donation of all the shares to the Euclid Foundation. He received a tax refund of 60% on the total value of his donation. However, he had to pay a tax of 20% on the increase in the value of the stock. Determine the value of N if the difference between his tax refund and the tax paid was $1000.

Answer 1

The main reason for giving appreciated stock to a charity is to avoid paying any capital gains tax on the stock.
but anyway

paid 100 * 10 = 1,000 for stock
it was worth 100 N when granted

got a refund of .6(100 N) = 60 N

paid tax = .2(100 N - 1,000)
so
60 N - (20 N - 200) = 1,000

40 N = 800

N = 20 It doubled

Answer 2

five years after buying 100 shares of XYZ stock for 50​$ per​ share, you sell the stock for 7700

Answer 3

Consider a home mortgage of ​$225000 at a fixed APR of 15​% for 15 years