Purana and Naya are two brands of kitchen mixer-grinders available in the local market. Purana is an old brand that was introduced in $1990$, while Naya was introduced in $1997$. For both these brands, $20\%$ of the mixer-grinders bought in a particular year are disposed off as junk exactly two years later. It is known that $10$ Purana mixer-grinders were disposed off in $1997$. The following figures show the number of Purana and Naya mixer-grinders in operation from $1995$ to $2000$, as at the end of the year.

$$\begin{array}{|c|c|c|}\hline\text{}&\textbf{1995}&\textbf{1996}&\textbf{1997}&\textbf{1998}&\textbf{1999}&\textbf{2000}\\\hline \textbf{Purana}&120&162&182&222&236&236\\\hline\textbf{Naya }&0&0&30&80&124&134\\\hline \end{array}$$

How many Purana mixer-grinders were purchased in $1999$ _______