How to pronounce 五十蚊 in Cantonese (2 out of 3):

全數大約三百五十蚊
That's about $350 in total.

Cantonese Sentence Breakdown

全數 cyun4 sou3
all
quota
大約 daai6 joek3
(adverb) About
三百 saam1 baak3
three hundred
五十蚊 ng5 sap6 man1
fifty dollars