The percentage distribution of the number of tires of different brands produced in a year by a certain factory is shown in a pie chart with the following distribution: Avon $21\%$, Cooper $20\%$, Dunlop $15\%$, Good year $12\%$, Firestone $14\%$, Hankook $7\%$, and Continental $11\%$. If the total number of tires sold is $1350$,


what is the difference between the average number of Avon and Firestone tires sold together and the average number of Good year and Dunlop tires sold together?

1. A
   55
2. B
   46
3. C
   54
4. D
   45