HI, I am rebuilding a year for a friend, and all she has is the print out of journal entries for the year and the bank statement.  I am doing ok for everything but the payroll

I need to input in the payroll module, but with only the journal entries I can't get any paycheque to work.  Everything works except I am stumped with what I am entering as the CPP Payable and EI Payable, as they calculate the EII Expense and CPP Expense. but can't figure out a formula that works.  I know that the CPP is half of what is the Credit when posting in the payroll module, but how do I figure out what figure I need to multiply the EII by to get the correct figure. 

EX -                           Debit             Credit

5300 Wages         660.96

5310 EII Expense   17.40

5320 CPP Expense 26.05

1070 Chq account                                573.19

2310EII Payable                                     29.83

2320 CPP Payable                                 52.10

2330 Income Tax Payable                     49.29