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Cost of services, selling and administrative
 12 Months Ended
Sep. 30, 2022
Analysis of income and expense [abstract]  
Cost of services, selling and administrative Costs of services, selling and administrative
Year ended September 30
2022 2021
$ $
 Salaries and other member costs1
 7,798,407  7,317,113 
 Professional fees and other contracted labour 1,459,295  1,262,659 
 Hardware, software and data center related costs 790,447  830,199 
 Property costs 214,430  216,506 
 Amortization, depreciation and impairment (Note 24)
 468,334  505,562 
 Other operating expenses 45,651  46,125 
10,776,564  10,178,164 
1    Net of R&D and other tax credits of $155,856,000 in 2022 ($167,198,000 in 2021).