Total Sales (from Invoices or Opportunities) Problem: Salesforce does not display the total sales figure you want to calculate and display on the Account page. Account, Custom Object, Opportunity, SUM
Count Contact Records with a Filter Applied Problem: You need to display a count of the total records that meet some condition on the parent, and Rollup Summary Fields are NOT an option. For example, you may get asked, "How many VP Contacts... Account, Contact, COUNT
Creating Account Hierarchy Rollups without Coding Problem: Within Salesforce, it is not possible to do hierarchy rollups without Apex coding. Standard roll-up summary fields will not support these types of roll-ups. Account, Hierarchy, Featured