The table below show the pounds of candy a company sold in the months leading up to October.
| Month | Pounds of Candy Sold |
| June | 134 |
| July | 146 |
| August | 182 |
| September | 158 |
| 620 |
In October they sold 7 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?