Answer: 9.99€
Explanation:
The euro symbol (€) comes after the number.
The sign to separate decimals when expressing a number in figures can be a period or a comma. Both signs are valid, but the Academy of the Spanish Language recommends the use of the period (.) to separate the decimals.
Therefore we use a period (.) to separate the euros from the cents.
Also, to facilitate the reading of numbers with more than four digits, spaces are recommended, not using a period or a comma.
9 999.99€
I have posted an example.
<h2><em>Spymore</em></h2>