When I've set up Expense tracking DAs for customers in the past, the trick is that there needs to be some kind of binary data element that allows you to segregate your expense types. The two most common ways to do this are:
- Add a "Category" picklist field (I prefer a Radio Button type) that allows you to specify if the expense record is CapEx or OpEx. This allows you to have one expense amount field in the record, then you can group/sort/filter by the Category field in views and reports.
- Have one field for CapEx and one for OpEx amounts. This requires you to segregate the expenses in the spreadsheet prior to import, but gives you not only the grouping/sorting/filtering capabilities of the Category field, but allows you to create an aggregate field on the project that summarizes expenses by type.
Based on the scenario you desribe here, I'd recommend exploring the first approach. You can probably write a macro in Excel that evaluates the Account field and assigns the correct Category value prior to the import.