how do I do this? please only answer using the numbers i have provided.

Federal Income Tax Withholding Bob Dunn's weekly gross earnings for the present week were $2,300. Dunn has three exemptions. Using the wage bracket withholding table in Exhibit 2 with a $75 standard withholding allowance for each exemption, what is Dunn's federal income tax withholding? Round your answer to two decimal places. 257.586 x Feedback Check My Work When using the withholding wage bracket, the first two columns are used to determine which bracket the employee's earnings fall into; the third column shows the minimum amount of federal income tax to be withheld; and the final column indicates how much additional tax must be withheld above the minimum. Locate the proper withholding wage bracket in the wiltholding table. Pay attention to how many exemptions the employee is claiming