Hi!
I am not quite sure the formula I am supposed to use for this or where each piece of information belongs. How would I solve this question?

Jeff Krause purchased 1,000 shares of a speculative stock in January for $1.89 per share. Six months​ later, he sold them for $9.26 per share. He uses an online broker that charges him $10.00 per trade. What was​ Jeff's annualized HPR on this​ investment?

Thanks!