Hello guys,
i need help calculatin how much money has been paid for a specific transport company for a certain month.
For example sum the last columnt if the first column equals Schenker and the date is in January.
| Company | Date | price |
| Schenker | 1.1.2018 | 500 € |
| KN | 1.2.2018 | 600 € |
| DHL | 1.3.2018 | 400 € |
Thank you
By: Georgi Kostadinov