To calculate Vikki's gross income on each paycheck, you need to divide her annual salary by the number of pay periods in a year.
Since Vikki is paid twice a month, she receives 12 paychecks per year:
\[ \text{Number of paychecks per year} = 2 \text{ (per month)} \times 12 \text{ (months)} = 24 \]
Now, divide her annual salary by the number of paychecks:
\[ \text{Gross income per paycheck} = \frac{\text{Annual Salary}}{\text{Number of Paychecks}} = \frac{53,000}{24} \approx 2,208.33 \]
Therefore, Vikki's gross income on each paycheck is approximately $2,208.33.
The correct answer is: $2,208.33.