ついでに
tsuideni

Adverb

1. while (one is at it); when; on the occasion of; at the same time (as); on one's way (to); by the way; incidentally; in passing

Usually Written in Kana
ついでに わたくしのも ってきてくれますか。
tsuideni watashinomo katte kite kuremasuka
Can you buy one for me as well?
Other forms: