I recommend taking Intro to Finance COMMERCE 2FA3 (really easy course you can get done with in summer).
If you want to take another one, I'm not really sure, since Financial accounting COMMERCE 2AA3, isnt offered summer term 2, and all of the other courses offered term 2 have a pre-req for a term 1 course (such as managerial accounting). So you might want to get done with an elective from 2nd year in summer term 2, that would be my suggestion..
Hope this helps