How to pronounce 先算 in Cantonese (1 out of 11):

廢青就當係400蚊先算啦 用返港元兌美金 廢青當1:8算啦
So, if you can get rid of the blue, you can get $400 and then you can get rid of the blue in HK$, and then you can get rid of the blue at 1:8.

Cantonese Sentence Breakdown

廢青 fai3 cing1
young and useless
就 zau6
at once
right away
only
just (emphasis)
as early as
already
as soon as
then
in that case
as many as
even if
to approach
to move towards
to undertake
to engage in
to suffer
subjected to
to accomplish
to take advantage of
to go with (of foods)
with regard to
concerning
to yield oneself to
to compromise
will do
no other
to let
allow something be a certain way
according to
supposing
either…or
exactly
precisely
definitely
to accommodate
has
have been
to give in
當 dong3
right
trap
trick
pawn
to regard as
to pawn
thought
fit
proper
safe
appropriate
to treat as
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
蚊 man4
mosquito
gnat
dollar
ten thousand
ten thousand bucks
先算 sin1 syun3
calculate first
啦 la5
“now”, with an connotation of doubt
surprise
disapproval
用返 jung6 faan1
use again
港元 gong2 jyun4
Hong Kong dollar
兌 jeoi6
alternative form for 銳, sharp
美金 mei5 gam1
US dollars
算 syun3
to regard as
to figure
to calculate
to compute
to count
to plan
to guess
to suppose
to reckon
to include
to count in
as
to consider
to matter
let it be
that's enough
finally
at long last