A Platform App Builder wants to see the total sales for each Account.

The required metric is the total monetary value of won Opportunities for each Account. Salesforce supports roll-up summary fields on Account that aggregate Opportunity Amount and apply filtering criteria so that only qualifying child records are included. The appropriate configuration therefore uses SUM on Opportunity Amount with a filter restricting the calculation to Opportunities whose Stage represents Closed Won. Option C would incorrectly include open and lost Opportunities. COUNT-based options calculate the number of records rather than total sales value, and the roll-up belongs on the Account because that is where the summarized result must appear. Salesforce ' s current documentation specifically gives the example of an Account roll-up displaying total Opportunity amount and filtering the aggregation to only won Opportunities.

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