Account Cash Rounding Module
The account_cash_rounding module allows cash amounts to be rounded using the cash rounding factor of the currency.
When the invoice has to round the lines to pay, the exceeded amount is debited or credited to the accounts defined on the accounting configuration.
Sales and invoices have the rounding activated by default based on the accounting configuration flag. Purchase use the last purchase for the supplier as the default value and transfer the value to the created invoices.