What would be the correct pronoun for a business setting? My knowledge of the language is rudimentary at best (several semesters in High School); we only really learned watashi/atashi/boku (and were reprimanded if we used the wrong pronoun for our own gender).

In doubt use watashi, it's hard to go wrong with it. The more formal watakushi is also good but you need the keigo to match, and there is such a thing as excessive politeness, even in Japanese.