A: HK$3270 x 3days / 30days = HK$327.
These 3 days are 28, 29 and 30 April.
And you should pay HK$3270 on 5th June. This HK$3270. is salary of May. [1st May - 31st May]
問題2: 五一勞動節是法定假期, 但佢未做夠3個月, 係咪唔使俾錢? 如果用錢代替假係咪犯法?
A: 未做夠3個月, domestic helper can't entile "aid" Labour Holidays but she still have those labour holidays without wages. If you want your domestic helper working on those days, you should pay her wages.