Please I need help! Payroll assignment

Judy works in Alberta and earns an annual salary of $40,800.00 paid on a weekly basis. She has received an increase in her salary to $41,800.00 annually. The Payroll Department was not notified of the increase immediately, therefore 3 pay periods have elapsed. Judy's regular pay has already been processed so she will be paid her retroactive increase on a separate cheque. Her federal and provincial TD1 claim codes are 1. She will not reach the Canada Pension Plan or Employment Insurance annual maximums this pay period. Calculate net pay on new salary Paragraph