Hello Bjorn,
Welcome to the Make community.
We don’t have enough information to assist you yet. Please attach your mapping (HubSpot module configuration) and the Apple Mail module output bundle.
You can also attach the scenario’s blueprint.
For instructions, please refer to one of @samliew’s guides: https://community.make.com/t/how-do-i-sum-different-attributs-from-different-bundles-and-store-the-output-in-the-original-attribute-name-so-they-can-sum-only-the-same-values-from-each-bundle/40583/8?u=mszymkowiak
Have a nice day!