Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Driver | Constructor | Laps | Time/Retired | Grid |
| --- | --- | --- | --- | --- |
| Jim Clark | Lotus - Climax | 32.0 | 2:23:34.8 | 2.0 |
| Jackie Stewart | BRM | 32.0 | +44.8 secs | 3.0 |
| Bruce McLaren | Cooper - Climax | 31.0 | +1 Lap | 9.0 |
| Jack Brabham | Brabham - Climax | 31.0 | +1 Lap | 10.0 |
| Graham Hill | BRM | 31.0 | +1 Lap | 1.0 |
| Richie Ginther | Honda | 31.0 | +1 Lap | 4.0 |
| Mike Spence | Lotus - Climax | 31.0 | +1 Lap | 12.0 |
| Jo Siffert | Brabham - BRM | 31.0 | +1 Lap | 8.0 |
| Lorenzo Bandini | Ferrari | 30.0 | +2 Laps | 15.0 |
| Dan Gurney | Brabham - Climax | 30.0 | +2 Laps | 5.0 |
| Jochen Rindt | Cooper - Climax | 29.0 | +3 Laps | 14.0 |
| Lucien Bianchi | BRM | 29.0 | +3 Laps | 17.0 |
| Innes Ireland | Lotus - BRM | 27.0 | +5 Laps | 16.0 |
| Richard Attwood | Lotus - BRM | 26.0 | Accident | 13.0 |
| Masten Gregory | BRM | 12.0 | Fuel Pump | 20.0 |
| Jo Bonnier | Brabham - Climax | 9.0 | Ignition | 7.0 |
| Ronnie Bucknum | Honda | 9.0 | Gearbox | 11.0 |
| John Surtees | Ferrari | 5.0 | Engine | 6.0 |
| Frank Gardner | Brabham - BRM | 3.0 | Ignition | 19.0 |
Question:
When the laps are 31 and the constructor was honda, what's the sum of all grid values?
Answer:
4.0