How would I find all of the information given below. please include all formulas.

Angelica purchased stock valued at $40,000 in 2000. In 2005, she sold the stock for $52,000. Angelica's capital gain, for tax purposes, is $ 12000 , which is a 30 % gain on her investment. Over the period during which Angelica owned her stock, asset prices rose by 4% due to inflation. Thus Angelica's real capital gain is 26 %, or $ 10,400