Alaska u r right, registered GST company can claim back their GST. Infact they gain by charging GST (but i think they are allowed to charge consumer). They should work backwards - let say $10.00 bill = $10.00 divide by 107% = $9.30 (round off to the lowest) instead of $10.00 x 7% = 10.70. Different company works differently, if you notice the receipt by other big establishment you will know what i mean.
I don't support the entire punggol zhi char, too much liao, not nice (include the newly open 301) yet pay more. i rather support other stall, i'll be more happy!