If your country requires rounding of sales to the nearest 5c, you can achieve this in Vend by creating a set of simple 'rounding' products, with no inventory tracking for example, with plus and minus values.

$0.01
$0.02
-$0.01
-$0.02

Then add these as quick keys under a separate tab, so they can be quickly applied to a sale where the total must be rounded to the nearest 5c.

If you integrate Vend with Xero, you can assign each of these products to a unique account code, for tracking rounding totals throughout a financial period.