Megan bought 3 lots shares of stock at a price of $15 a share. She used her 60% margin account to make the purchase. Megan sold her stock after a year for $17 a share. She paid $10 transaction fee per transaction and $20 interest fee, what is Megan's return on investor's equity for this investment? 67.26% 19.00% 20.74% 10.50%