Marydoll
Sorry to be a pedant, but the secondary school maths teachers, I worked with, insisted the decimal point goes in the middle,
£12000·00 
A decimal point goes in the centre of a number.
Surely that depends on the context of the number.
If ££ and pence (even 00) are involved, the decimal point goes before the pence- as established at decimalisation back in 1971
From a guide by the University of Edinburgh
Money
Use the £ symbol, or p as an abbreviation of pence. Write out other currencies in full where possible.
Use the pound symbol before the number, with pounds and pence separated by a full stop
For amounts under £1, use p as an abbreviation for pence
Examples
The cost of replacing a card is £5.00
If you return your library book late, you will be charged 75p per day per book.