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Thread: Help with making a formula

  1. #1
    Newbie
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    Help with making a formula

    Hours 4.75
    x
    $81.00 base rate
    = $384.75
    11% of $384.75 $42.32


    5% of $384.75 $ 19.24

    -10% of $384.75 -$38.48


    15% of $384.75 $57.71
    + $4.00
    Total = $469.54

    So my question is that i need help coming up with a formula so i can plug in the total with a number and it come out with the base rate amount
    to explain this problem this is 4.75 hr multiplied by 81$ which gives you 384.75 then individually you take the % from that base total of 384.75 add all them together and the 4$ fee and you get 496.54 but i want to make a formula so that i just plug in my total number of 496.54 and it says the base hourly rate is 81$. Someone please help me.
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  2. #2
    MHF Contributor
    Joined
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    California
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    Re: Help with making a formula

    It looks like you've got
    $Total = (hr \cdot baserate)(1+0.11+0.05-0.1+0.15)+4$

    $Total-4 = (hr \cdot baserate)(1.21)$

    $baserate = \dfrac{Total-4 }{1.21 \cdot hr}$
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