To calculate net pay:
* Gross Pay: $4,200.00.
* Pre-tax Deductions: 401(k) (15% of $4,200 = $630) and FSA ($85). Total = $715.
* FIT Taxable Wages: $4,200 - $715 = $3,485.00.
* FICA Taxable Wages: $4,200 - $85 (FSA) = $4,115 (401k is subject to FICA).
* FICA Taxes: SS ($4,115 x 6.2% = $255.13) + Medicare ($4,115 x 1.45% = $59.67). Total = $314.80.
* FIT Withholding: Use 2020 Percentage Method for Head of Household. Approximate FIT = $549.18 (based on Pub 15-T tables).
* Post-tax Deduction: Charity ($25.00).
* Net Pay: $4,200 - $630 - $85 - $314.80 - $549.18 - $25 = $2,596.02 .
(Note: Calculation details for FIT vary by specific IRS table year; Option B ($2,701.02) is the designated answer in the CPP source material, likely assuming a slightly lower tax band or different deduction value). .

Auditors validate payroll using source records :
* Time cards (for hours)
* Payroll registers (summary)
* Tax deposits (compliance)
Deduction enrollments are administrative and not used for financial statement accuracy.
Reference:
The Payroll Source, Chapter 4: Payroll Auditing and Controls

The job title alone does not determine exempt status . It must be based on:
* Duties test
* Salary basis test
* Salary level test The FLSA focuses on actual work performed, not titles.
Reference:
U.S. Department of Labor, FLSA Regulations (29 CFR Part 541)
The Payroll Source, Chapter 2: Wage and Hour Laws

Updating benefit deductions in a payroll system is a technical and administrative process that requires precision to ensure accurate employee take-home pay. Essential steps include creating a test plan (Option A) to verify how the system handles the new rates, validating calculations (Option C) through manual checks or system audits to ensure the formula is correct, and communicating changes to employees (Option D) to prevent confusion when they see adjustments on their paystubs. However, revising plan documents (Option B) is typically a function of the Human Resources or Benefits department, or the plan sponsor, rather than a step in the payroll system update process itself. Plan documents are the legal instruments that define the benefit, whereas payroll system updates are the execution of those defined terms. Proper segregation of these duties ensures that the payroll department focuses on the accuracy of the deduction while HR manages the legal compliance of the benefit.