$835.20 (option 2)
Step-by-step explanation:
Different number of employees have different pay
The total pay for 19 employees = 19 × 360 = $6840
The total pay for 18 employees = 18 × 400 = $7200
The total pay for 8 employees = 8 × 480 = $3840
The total pay for 5 employees = 5 × 600 = $3000
The sum paid in total to all employess = $6840 + $7200 +$3840 + $3000
The sum paid in total to all employess weekly = $20880
A raise of 4% to all employees = 4% × $20880
= 0.04 × $20880
A raise of 4% to all employees = $835.2
The amount a raise of 4% will add to the weekly payroll = $835.20 (option 2)