maximum possible total amount of money

[Phantom]

To the nearest pound, Jon has £9
To the Nearest 50p, Ellie has £6.50

Work out the maximum possible total amount of money

 

[JeffM]

So what is the maximum number of pence.

 

[Steven G]

What is the most Jon could have if it rounds to £9?
What is the most Ellie could have if it rounds to £6.50?