Gross Pay = 141,642.50
Contribution Benefits = 1,261.55 + 200 + 992.95 = 2,454.50
Taxable Pay = 139,188.00
PAYE Before Relief = 36,850.00
Relief = 1,162.00
PAYE after Relief = 35,688.00
Net Pay = 105,954.5
Deductions = 4454.50
Net Pay after Deductions = 101,500 (EFT into Coop)
I couldn't arrive at 105,221.00
There must be a benefit which you are receiving e.g. welfare fund, telephone or car for which some tax is being charged. Or the employer is paying some tax for you on your behalf (e.g. due to travel per diems etc) and tax on tax is being charged.
Either way, ask your HR/Accounts office to clarify. Maybe kuna mtu anachota a few shillings from everyone's salo...