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Required information [The following information applies to the questions displayed below.] In 2010 Casey made a taxable gift of $5.6 million to both Stephanie and Linda (a total of $11.2 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 Exhibit 25-1 and Exhibit 25-2.) Note: Enter your answers in dollars, not millions of dollars. Leave no answer blank. Enter zero if applicable. c. This year Casey made a gift worth $15.6 million to Stephanie. Casey married Helen last year, and they live in a common-law state. The 2010 gift was the only other taxable gift Casey or Helen has ever made. Casey and Helen elect to gift-split this year