Has anyone successfully implemented Price Indexing with normalization (http://en.wikipedia.org/wiki/Price_index) ? I have been able to do the Fisher Ideal, but the problem arises when you try to normalize the indices based on the user selection and you want to only compare one particular month versus the latest selected month.
Gives me a monthly index of price change when comparing receipts to the previous years average unit price (calculated in the script) by part. Awesome! I also am able to obtain an annual total, though not in the same object. but, I'm cool wit dat.