8 in numeric numbers is VIII.
2000
16,000
A number must, surely, be numeric! I suggest writing it as 24000.
In today's notation: MCCXL
They are already expressed as numeric numbers.
You have written 17 in numeric numbers in your question.
8 in numeric numbers is VIII.
$10.00
DD
5000
XX
(VI)
45,000
CV
MCDXXXVI
45,000