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 January 4th, 2013, 06:57 AM #1 Newbie   Joined: Jan 2013 Posts: 2 Thanks: 0 No good at maths! so stumped! Hi All, A posing question. Here's the scenario. Excel related! A Man sells cupcakes. Every cake costs 10P
 January 4th, 2013, 09:31 AM #2 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1039 Re: No good at maths! so stumped! Are you a math student? What grade are you in? Can you post an actual similar problem taken from a math book? Yours is almost impossible to follow...
 January 4th, 2013, 10:37 AM #3 Senior Member   Joined: Mar 2012 From: Belgium Posts: 654 Thanks: 11 Re: No good at maths! so stumped! cost =10p profit=20p so that means he sells the cakes for 30p so if he makes x cupcakes he has to sell 1/3 cakes to break even. For example, if he makes 333 cupcakes he got a loss of £33.30, then he sells 111 and has got his money back.
 January 7th, 2013, 12:58 AM #4 Newbie   Joined: Jan 2013 Posts: 2 Thanks: 0 Re: No good at maths! so stumped! Not maths student but thought this might be the right section, so forgive me. Hmm. Tough one to try to put simply, as I don't think it's a simple calculation, but I'm no good at maths so any calculation's hard. What I aim to derive is, the formula which calculates the amount of cakes the man has to sell, to break even, taking in the potential loss that he would get from not selling cakes. So if he makes 10 cakes at a cost of -£0.10p, fails to sell 6 of them, that's -£1.00p loss, before he sells any of his ten cakes. Now if he sells 2 of them at £0.20p, he makes £0.40p. therefore the total loss is now only -£0.60p. So to break even, he would need to sell 3 more cakes to even out the cost of making the cakes. So out of 10 cakes, he has to sell 5 cakes, out of ten to break even. Because the cost of making them every time costs him money. So my proposed question was, and I'm no good at maths so I'm going to give it my best whirl to you clever lot, how do I derive the figure of break even. i.e., if X is equal to the amount of cakes, Y is equal to the total loss, and Z is equal to the profit gained. How does it formulate that figure as an example it take 1.367573 cakes to break even of X cakes sold subject to Y and Z (made up example). Not sure if this makes sense! lol
 January 7th, 2013, 05:15 AM #5 Global Moderator   Joined: Dec 2006 Posts: 21,020 Thanks: 2256 Suppose cost of manufacture = C per cake, n cakes are made, and the selling price of each cake is P. To break even, he must sell nC/P cakes, i.e., he must sell (100C/P)% of the cakes he makes. (Note that I used P for the selling price, not the profit.)
January 8th, 2013, 03:55 AM   #6
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Re: No good at maths! so stumped!

He must have that the cost of manufacture is less or equal to the selling price of each cake. I.e. C <= P if [color=#00AA00]skipjack[/color]'s definitions are used.

Quote:
 Originally Posted by [b skipjack[/b]](Note that I used P for the selling price, not the profit.)
You don't need the note; earlier, you wrote "the selling price of each cake is P". The note enables P to be read as total revenue, n*P. Definitions for n and P can be found in the first line of your post.

 January 8th, 2013, 05:15 AM #7 Global Moderator   Joined: Dec 2006 Posts: 21,020 Thanks: 2256 I thought that "selling price" and "total revenue" were unlikely to be confused, but as the original post seemed to be written without due awareness of the distinction between "selling price" and "profit", I wanted to draw attention to the terminology I'd decided to use.
 January 8th, 2013, 05:22 AM #8 Math Team   Joined: Apr 2010 Posts: 2,780 Thanks: 361 Re: No good at maths! so stumped! IMO, your thought is OK, but then you distinguish between them and in the note the distinction vanishes.

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