You have a $104,000 portfolio comprising 13 stocks. You trade each stock five times this year and each time you trade, you pay about $32 in commissions and spread. You have no special knowledge, so you earn only the average market return of 15% on your investments. How much lower will your total return be because of your trades? As a result of your trades, your total return will be \% lower. (Round to two decimal points.)