question about water consumption

[number1]

Hi florists, I am running a flower shop in a shopping center right now. My landlord wants to know how much water we used per year. But I really do not know, because the water tax is included in the rent, and we do not have water meter installed. Any flower shop owner here who has the water meter, could you give me some idea how much water will be roughly used for a flower shop?

Thanks.