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Math Help - Equation Help

  1. #1
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    Equation Help

    I am looking to find an equation for a work problem.

    I am a broker of a service and get 6% discount off a RRP. value of eg 100.
    - so my buy price will be 94.
    - My supplier makes 5% on the price that I buy at eg. 89.53


    is there an equation for knowing what my supplier buy price is from the RRP?

    The RRP varies dramatically so could be 867, 350 etc and I need a generic calculation so that I can deduct a certain % from RRP to get my buying price and the supplier buying price.

    Any help?
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  2. #2
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    Re: Equation Help

    Your buy price is (100-6)% = 94% of the RRP price. Your supplier get's 5% of that, so (100-5)% = 95% seems to be the amount you are looking for. So, your buy price is .94 RRP. Your supplier buying price is .893 RRP.
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  3. #3
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    Re: Equation Help

    thank you for that. Is there a general rule that I can run to find the supplier buying price and my buying price regardless of the RRP price.
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  4. #4
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    Re: Equation Help

    What you are asking is similar to choosing the winner of a contest without knowing who the contestants are. If both of the prices you want to calculate are determined by this RRP, then you cannot determine them without the RRP.
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  5. #5
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    Re: Equation Help

    i am given the final price RRP. But how can i find the supplier buy (SBP) price in one calculation that when added by 5% will equal My Buy Price (MBP). MBP is calculated by RRP - 6%.

    RRP - 6% = MBP
    SBP + 5% = MBP

    Hope that makes sense.
    it is difficult to explain.

    is there a way I can consistently find SBP by deducting a certain percentage from RRP
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  6. #6
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    Re: Equation Help

    So, $\text{MBP} = 1.05 \text{SBP}$ and $\text{MBP} = .94 \text{RRP}$. Setting those two equations equal gives $1.05\text{SBP} = .94\text{RRP}$. Solving for $\text{SBP}$ gives:

    $\text{SBP} = \dfrac{94}{105}\text{RRP}$

    If you prefer percentages, then SBP is approximately RRP - 10.58%
    Last edited by SlipEternal; March 18th 2014 at 06:28 PM.
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