Perfect! The tea is being made by two different individuals, so, it is very likely that they will not use exactly the same amount of sugar for making the tea.
This is the difference between a physical mixture like tea and a chemical substance like water. If one cup of tea has \(5 \, \mathrm{gm}\) of sugar, and another cup of tea has \(7 \, \mathrm{gm}\) of sugar, they are both called tea. But, if we take \(9 \, \mathrm{gm}\) of water, we will always get 8 gm of Oxygen.