It can't possibly be cents.
Someone has to run the exception report showing the failed debit orders. That person occupies floorspace, has a salary, a desk, a PC with software, network, telephone, stationery, group printer, coffee, etc, etc.
Then there's the person who actions the failed report and contacts the defaulter. That person has floorspace, a salary, a desk, a PC with software, network, apps, telephone, stationery, group printer, tea, parking bay, etc, etc.
Then there's the person who has to re-run the debit job for failed debit orders, and that person has floorspace, a salary, a desk, a PC with software, network, apps, telephone, stationery, group printer, tea, parking bay, etc, etc.
Then there's the ten extra people you have in customer services to field calls from the hundreds/thousands of customers every month who have failed debit orders. These people all have floorspace, a salary, a desk, a PC with software, network, apps, telephone, stationery, group printer, tea, parking bay, etc, etc.
It's a bargain at a mere R80, once you consider all the true costs to a company.