At the beginning of the month, you owned $7,200 of News Corp, $6,600 of First Data, and $6,200 of Whirlpool. The monthly returns for News Corp, First Data, and Whirlpool were 9.10 percent, -2.70 percent, and 11.23 percent. What's your portfolio return? (Do not round intermediate calculations. Round your final answer to 2 decimal places.) Portfolio return