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:
| Team | Outgoing manager | Manner of departure | Date of vacancy | Table | Incoming manager | Date of appointment |
| --- | --- | --- | --- | --- | --- | --- |
| Tatran Prešov | Roman Pivarník | Sacked | 22 August 2010 | Pre-season | Ladislav Pecko | 23 August 2010 |
| MFK Košice | Žarko Djurović | Mutual agreement | 28 September 2010 | Pre-season | Štefan Tarkovič | 28 September 2010 |
| MFK Ružomberok | Ladislav Jurkemik | Mutual agreement | 10 October 2010 | Pre-season | Goran Milojević | 11 Octobert 2010 |
| Slovan Bratislava | Jozef Jankech | Mutual agreement | 13 October 2010 | Pre-season | Karel Jarolím | 13 Octobert 2010 |
| Dukla Banská Bystrica | Karol Marko | Mutual agreement | 30 October 2010 | Pre-season | Štefan Zaťko | 8 November 2010 |
| FC Nitra | Ivan Galád | Sacked | 24 November 2010 | Pre-season | Ivan Vrabec | 21 December 2010 |
| FC Nitra | Ivan Vrabec | Sacked | 13 March 2011 | Pre-season | Cyril Stachura | 14 March 2011 |
| Spartak Trnava | Dušan Radolský | Sacked | 19 March 2011 | Pre-season | Peter Zelenský | 22 March 2011 |
Question:
What is the manner of departure when the date of vacancy is 28 september 2010?
Answer:
Mutual agreement