Final answer:
To calculate Omnidata's annual estimated taxable income as of the end of the third quarter, we need to consider the taxable income for the first three quarters and then annualize it.
Step-by-step explanation:
To calculate Omnidata's annual estimated taxable income as of the end of the third quarter, we need to consider the taxable income for the first three quarters and then annualize it. The total taxable income for the first three quarters is $240,000. To annualize it, we multiply by four quarters. So, the annual estimated taxable income as of the end of the third quarter is $240,000 * 4 = $960,000. Therefore, the correct answer is option D. $480,000.