| A new fast food restaurant opened 3 months ago. The table belows shows the number of burgers they've sold so far. |
| Month | Burgers Sold |
|---|
| 1 | 3,077 | | 2 | 1,638 | | 3 | 3,011 |
| 7726 |
|
| The next month (after spending some money on an ad) they sold 3 times as many as they had sold in the previous 3 months. How many more burgers did they sell after running the ad? |
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