phonetic Cantonese for "How much does it cost?":
GAY-daugh-CHEEN-ahhh?
That's "cheen" with the ch sound like the "ch" in "cheese".
(Grew up in Hong Kong).
Cantonese teacher held me after class one day to ask who I was learning my Cantonese from. I said our maid and asked why? She said I had the worst, Southern, working-class accent she had EVER heard (and she was local Chinese!). 
GAY-daugh-CHEEN-ahhh?
That's "cheen" with the ch sound like the "ch" in "cheese".
(Grew up in Hong Kong).