John is looking back on his basketball season. He knows that he scored $100$ baskets worth $2$ points and $30$ baskets worth $3$ points this year. He also knows that his scoring average for every basket he scored was $1.8$ points per basket. This information is summarized in the table below. **Fill in the missing blank with how many $1$-point baskets John scored this year.** Point value| Baskets :-: | :-: $1$ | [[☃ input-number 1]] $2$ | $100$ $3$ | $30$