Two hypothetical organic waste streams A and B are mixed prior to the composting process. Waste-A has $2.16 \%$ of $\mathrm{C}$ and $1.20 \%$ of N. Waste-B has $19.10 \%$ of $\mathrm{C}$ and $0.14 \%$ of N. The quantity of Waste-B that should be mixed with per kg of Waste-A to achieve the desired C:N ratio of 25 is __________ $\mathrm{kg}$ $\text{(rounded off to $2$ decimal places)}$.
Assume both the waste streams are completely dry.
