The following table shows the number of cars manufactured in ο¬ve consecutive weeks.
| Week | Number of cars manufactured |
| 1st week | 500 |
| 2nd week | 700 |
| 3rd week | 600 |
| 4th week | 300 |
| 5th week | 900 |
How many cars were manufactured in the ο¬rst four weeks, taken together?