Wesfarmers has sold $1.1 billion of Coles shares, reducing its holdings of the supermarket chain to 10 per cent, while revealing $24 million of payroll problems during its half-yearly results released today.

Wesfarmers has sold $1.1 billion of Coles shares, reducing its holdings of the supermarket chain to 10 per cent, while revealing $24 million of payroll problems during its half-yearly results released today.