The table below show the pounds of candy a company sold in the months leading up to October.
| Month | Pounds of Candy Sold |
| June | 113 |
| July | 198 |
| August | 135 |
| September | 200 |
| 646 |
In October they sold 8 times as many pounds of candy as they did in the previous 4 months combined. How many fewer pounds of candy did they sell in the previous 4 months compared to in October?