Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: find out the c . i on rs . 4000 at 4 % p . a . compound half - yearly for 1 1 / 2 years
244.83
4611.63.