In my Investments class we are trading options. I bought a TSLA call option for 8.80. I know that options come bundled in groups of 100. So did I actually invest $880 or did I only invest 8.80? I sold it at 9.45. Did I make less than a dollar or $85? I also see that I got charged commission twice. What would happen if I actually held on to the option until April 1st(Expiry Date)? How much would I lose?
Any help would be great thanks.