Question 1200738
the calculator at <a href = "" target = "_blank"></a> can help you solve this.
here are the results from using that calculator.
<img src = "http://theo.x10hosting.com/2023/030401.jpg">
you inputs are:
pv = 0
fv = 0
np = 2.5 year * 12 = 30 months
pmt = -40 (negative because it's what you spent)
ir = 6.5% per year / 12 = .541666666666666% per month
payment is at the end of each month.


calculator says that you will have 1,299.19 at the end of the 30 month investment period.
since the stereo is 1125, you'll have more than enough to buy it when you graduate.