Prediction formula

This is likely an easy one but I cannot seem to figure something that works. What I am trying to do is predict how many complaints my company will have during the fiscal year (from April 1 to March 30). Currently the calculation is being done manually base on the current complaints we have received this fiscal year.

Here is the formula:
- Number of current complaints / total of current fiscal days * 365=
- 31 complaint so far / 80 days into fiscal year * 365 = 141 complaint for 2012/2013

Thank you,
Karnold