Totals for selected transactions

From e-mail:

I’m doing my annual tax return, and I’m missing an existential feature in moneyGuru: When going into transactions and selecting the whole year range I want to see all costs associated with, say, "legal costs.” So, I enter the term into the search field and see all transactions within the time period. From those however, I only need some and not all. So, I’m selecting/highlighting the transactions I need and sum up the total value. It would be great if moneyGuru would do this for me. Like Excel for example. Show in the toolbar the value in the home currency of all selected/highlighted transactions.

I toyed with the idea of adding a drag & drop feature to any other app (Excel, Numbers), but the issue of multiple currencies dramatically reduced its potential usefulness.