QUES: Fluctuations in exchange rates are usually caused by actual monetary flows as well as by expectations of changes in monetary flows

correct the punctuation.

CORRECTED: Fluctuations in exchange rates are usually caused by actual monetary flows as well as by expectations of changes in monetary flows.

QUES: As an amateur goldsmith it was natural for me to make some maskrings which were clearly inspired by the North American Alaskan eskimos

correct the punctuation.

CORRECTED: As an amateur goldsmith it was natural for me to make some mask-rings, which were clearly inspired by the North American (Alaskan) eskimos.

QUES: This is the only iPod video converter supporting so comprehensive video file formats to iPod MP4 by building in lots of codecs

correct the punctuation.

CORRECTED:
This is the only iPod video converter supporting so comprehensive video file formats to iPod MP4 by building in lots of codecs.