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mathematical equation

I need to to develop a rather simple mathematical formula for a sliding scale price markup. Let's take an example to see what i mean: in the telecom world we have prices per minute for different calling destinations, ranging from 0.5 cents/min to say 90 cents/min. I would like to have a profit (price markup) of say 20% for the cheapest destinations (starting markup input variable), and gradually reduce the profit to a minimum of 10% for the more expensive destinations (limit markup input variable). It should of course be a curve function. There should be 3 inputs to the model: "starting markup", "limit markup", and some kind of a variable which defines how quickly the profit drops as the price increases. I just need the function which i will enter in excel or whereever... I guess this should be a piece of cake for a math expert. My budget is $15.

Skills: Data Processing

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About the Employer:
( 29 reviews ) Vienna, Austria

Project ID: #38402

9 freelancers are bidding on average $31 for this job

tfs

Dear Sir! I do this job for you for your price fifteen dollars with great pleasure and excellent quality. I work with mathematic all my life, so you`ll be pleased of my work Thanks Sergey

$30 USD in 0 days
(5 Reviews)
4.7
VoltSmith

Hi, I'm sending an excel file in the private message area. Could you kindly check if that file works? Regards Rahul

$30 USD in 1 day
(1 Review)
1.0
Treaclewebs

Hello - I use Excel on a regular basis and am a Statistician. I would be happy to set up an Excel Spreadsheet for you with the relevant formulae and probably look-up tables highlighting the destinations etc. Please fee More

$30 USD in 0 days
(0 Reviews)
0.0
kiokups

hi, i already know the solution to your problem. Please contact me. Im a Math graduate minor in statistics.

$30 USD in 0 days
(0 Reviews)
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doitfast

will do it for fifteen dollars escrow required

$30 USD in 0 days
(0 Reviews)
0.0
roberto2001

you'll have all what you asked on excel.

$40 USD in 1 day
(0 Reviews)
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cokebottle308

Hello, I can help you with your project. I have a great deal of experience with Excel and Office in general, and have completed a project very similar to this one for another client. I can work within your budget, t More

$30 USD in 1 day
(0 Reviews)
0.0
knowledgehub

Hello, Please check PMB. Kind Regards KHS (KnowledgeHub)

$30 USD in 2 days
(0 Reviews)
0.0
kmohan1962

Hello, It'll be done in Excel if you want for $10

$30 USD in 1 day
(0 Reviews)
0.0