At the beginning of the month, you owned $5,500 of General Dynamics, $7,500 of Starbucks, and $8,000 of Nike. The monthly returns for General Dynamics, Starbucks, and Nike were 744 percent,-1.36 percent, and-0.54 percent What is your portfolio return? (Do not round intermediate calculations and round your final answer to 2 decimeal places.) % Portfolio return