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 November 11th, 2014, 07:07 AM #1 Newbie   Joined: Nov 2014 From: brasil Posts: 1 Thanks: 0 Help writting financial distribution formula I need help writing a function to calculate the financial contribution of a product subscription into a given month. Not so straight forward however, since it has to consider months with fixed length (30 days) while the subscription is of arbitrary duration. i.e. Having $m$ as a month of $L(m)$ days and $p$ is a product which has a price $V(p)$, and has been active for $N(m,p)$ days for that month, I am looking for the function $D(m,p)$ which has constant value for every $m$. E.g.: For a 30\$product "SportsChannel", valid from 20/02/2014 to 19/03/2014,$D(FEB, SportsChannel) = x$$For the same 30\ product "SportsChannel", though valid from 20/03/2014 to 19/04/2014, I should also get D(MAR, SportsChannel) = x$$ I guess the trick is in making $N(m,p)$ constant, as the number of "real" days ($L(m)$) in each month varies (28 in FEB vs 31 in MAR). Provided that, than I could plug it into something like $D(m,p)=V(p)*\frac{N(m,p)}{\sum_{i=0}^{m_{max}}N(m _i,p)}$ I don't have a lot of practice trying to model my problems in math terms, so sorry if misused the syntax and feel free to bluntly correct me Anyway, thanks for the help. p.s.: is it possible to simplify $\frac{N(m,p)}{\sum_{i=0}^{m_{max}}N(m_i,p)}$? Tags distribution, financial, formula, writting Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post MikeH Probability and Statistics 1 April 16th, 2014 12:15 PM MikeH Advanced Statistics 0 April 16th, 2014 10:50 AM MyNameIsVu Number Theory 13 April 12th, 2009 08:40 PM jon80 Algebra 0 April 11th, 2009 09:37 AM MyNameIsVu Computer Science 2 December 31st, 1969 04:00 PM

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