Final answer:
To calculate the revenue, multiply the weekly salary by the number of weeks. To calculate the expenses, multiply the withheld amount from the paycheck by the number of weeks. Finally, to calculate the net profit, subtract the expenses from the revenue.
Step-by-step explanation:
To calculate the revenue for the 4-week period, multiply your weekly salary by the number of weeks. In this case, $400 * 4 = $1600.
To calculate the expenses for the 4-week period, multiply the withheld amount from your paycheck by the number of weeks. In this case, $100 * 4 = $400.
To calculate the net profit, subtract the expenses from the revenue. In this case, $1600 - $400 = $1200.