I need assistance calculating unused exemption equivalent, please and thank you

In 2010 Casey made a taxable gift of $5.3 million to both Stephanie and Linda (a total of $10.6 million in taxable gifts). Required: Calculate the amount of gift tax due this year and Casey's unused exemption equivalent under the following alternatives. (Refer to Exhibit 25-1 and Exhibit 25.2.) (Enter your answers in dollars, not millions of dollars. Leave no answer blank. Enter zero if applicable.) roblem 14-49 Part b (Algo) This year Casey made a taxable gift of $15.3 million to Stephanie. Casey is not married, and the 2010 gift was the only ther taxable gift he has ever made. EXHIBIT 25-1 Unified Transfer Tax Rates* "The applicable credit and exemption are sero for estates that opted out of the estate tax in 2010. EXHIBII 25-2 The Exemption Equivalent *The applicable credit and exempton are zero jor rawpuyers wru ypt out of the estate tax in 2010