Elections, elections, candidates ...

In the State of Zabolotiya, in the parliament, one deputy must be elected from each of the 999 electoral districts with the same number of voters in each. In Zabolotiya there were only three parties: the party of vodka lovers, the party of beer lovers and the party of lovers of soft drinks. According to sociological research, the sympathies of the population in the middle of the country were as follows:
(A) A party of vodka lovers: they are supported by 15% of voters.
(B) Party beer lovers: they are supported by 30% of voters.
Partiya lovers of soft drinks: they are supported by 55% of voters.
If in the first round no candidate scores 50%, in the second round the two who have scored the most votes pass.
Assess what is the smallest and which is the largest number of candidates from each party can be elected to the parliament of Zabolotiya?