You use the ten characters 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 instead of alphabetic characters.
They are already expressed as numeric numbers.
You have written 17 in numeric numbers in your question.
8 in numeric numbers is VIII.
1995 in "numeric numbers"(?) is 1995. In Roman numerals it would be MCMXCV.
2000
45,000
$10.00
DD
XX
(VI)
MCDXXXVI
45,000