How is your salary calculated?
I'm thinking you might need three tables.
An Events Table, A Staff table and a Join table for these two. (EventStaff)
That way you can attach a staff member to an event.
The "EventStaff" table would need:
Id - Number field, auto enter serial number
EventIdFk - Foreign key for the EventId - with a relationship to the EventId in the Event table
StaffIdFk - Foreign key for the staff - With a relationship to the StaffId in the Staff table
And some fields to calculate the wages. But I don't know how they are calculated. Hence my question.