These totals are always carried out in the local currency.
According to the result required, it is possible to display the open item amounts either in local currency or in transaction currency, the last column systematically presenting the local currency amount.
Thus, for a screen where the amounts are presented in "local currency", the last column will display the amounts presented in "transaction currency"; on the other hand, a screen where the open items are presented in "transaction currency" will display in the last column the open item amounts in local currency.