Need to get reports from badly formatted exported data

Hi everyone second post, so hope I get this right!

Attached is an example of the excel sheet a system gives when you select 'export to excel'. It (badly!) shows the employee name, leave type, leave dates and durations.

What I need to be able to do is either create a tab that has formulas to pull the key info, or a pivot table. I have posted here rather than the pivot forum as the current format won't allow a pivot to be created (so guessed I would need to reformat with formulas before I can create a pivot).

The information I need to summarise from this data is:
- How many days leave in a set time period for each leave type (there are 15 types in total and days are listed in col C)?
- Based on the above, which employees had that type of leave?

Examples of queries I need to answer based on the summarised data:
- How many people were sick in September?
- How long was the average person sick in September?
- How many days were taken as holiday in September?
- Who was on mat leave in September?


I really hope I have explained clearly, thank you in advance.