(Holding-period dollar gain and return) Suppose you purchased 19 shares of Disney stock for $20.16 per share on May 1, 2012. On September 1 of the same year, you sold 19 shares of the stock for $15.74. Calculate the holding-period dollar gain for the shares you sold, assuming no dividend was distributed, and the holding-period rate of return. a. The holding-period dollar gain for the shares you sold is $. Enter a negative number if it is a loss. (Round to the nearest cent.) b. The holding-period rate of return is %. (Round to two decimal places.)