Casio dr 320tec printing calculator casio dr 320tec p this printing calculator from casio is a must have item for any mathematics enthusiast as it features a host of excellent features and functions including br br euro conversion 3 rates br tax calculation br profit calculation cost sell margin br percentage delta percentage calculation br decimal selector 0 1 2 3 4 6 add2 br 3 digit comma markers br triple zero key br independent memory br grand total memory br rounding sele