A person consumes $2.5$ liters of water per day. The water quality test indicated that the supplied water has a $\mathrm{Pb}$ concentration of $0.6 \mathrm{mg} / \mathrm{L}$. If the weight of the person is $75 \mathrm{~kg}$, the exposure level for $\mathrm{Pb}$ for this person from this drinking water source is __________ $\mathrm{mg} / \mathrm{kg} /$ day $\text{(rounded off to $2$ decimal places)}$.
