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How to create expression on save of collection
I need to calculate total cost * quantity in expression of everytime user add new item in list on same form
I am following this tutorial http://help.bizagi.com/bpmsuite/en/index.html?store_the_total_value_of_a_col.htm
but I don't know how to set expression on save button for collection, also I need to change currency from $ to £.
Many Thanks
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