Required information [The following information applies to the questions displayed below.] In 2010 Casey made a taxable gift of $6.6 million to both Stephanie and Linda (a total of $13.2 million in taxable gifts). Calculate the amount of gift tax due this year and Casey's unused applicable credit under the following alternatives. (Refer to and Exhibit 25-2.) Note: Enter your answers in dollars, not millions of dollars. Leave no answer blank. Enter zero if applicable. a. This year Casey made a taxable gift of $1 million to Stephanie. Casey is not married, and the 2010 gift was the only other taxable gift he has ever made