Final answer:
To calculate the net income, one must deduct taxes, social security, and medicare from gross income. A given example shows calculating after-tax income using a 20% tax rate and further details on calculating tax liability. However, insufficient information is provided to determine the exact net income without additional data on deductions specific to each job position.
Step-by-step explanation:
To calculate the net income for the job positions, we must consider the gross annual income, taxes (federal, state, and any local tax), social security, and medicare deductions. If the tax rate is 20%, we need to calculate 20% of the gross income to find the tax amount. Then, subtract this tax amount and any social security and medicare deductions from the gross income to arrive at the net income. For instance, if someone has a national income of $300, the tax amount would be 20% of $300, which is $60. Therefore, the after-tax income would be the national income of $300 minus the tax amount of $60, resulting in $240.
In the tax example provided, the calculation for a taxable income of $20,000 is demonstrated. The formula given is $837.50 + 0.15 × ($20,000 - $8,375), which equals $2,581.25. This formula should be applied to the gross income amounts provided to find the tax liability before calculating the net income using the method described above.
The information given is incomplete to determine the net income definitively; more data on social security and medicare deductions and any other withholdings or deductions specific to each job position are required to provide an accurate calculation.