Question 92585
Martha currently drives 10 miles to work (one way) where she makes $13.00/hour.
Her new job is 7 miles further (one way) than her old job. How much of a raise should she ask for to compensate for the increase in distance?
What other information do I need, and what formula(s) should I be using?
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WE should know the cost per mile to operate her car, here is a method
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Assuming she works an 8 hr day and makes a round trip each day.
Old job round trip = 20 mi; New job round trip = 34 mi
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Assume it cost $1 per mile to drive her car. (makes it easy)
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She makes 8 * 13 = $104 per day and drives 20 miles
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Let x = amt of increase per day to equal her original job
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New job net income = old job net income
 (104+x) - 34 = 104 - 20
  x = 104 - 20 + 34 - 104
  x = $14 per day increase in pay
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That's an hourly increase: 14/8 = $1.75 per hour; which is $14.75 per hr
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We can check this out:
Old job net = new job net
(8*13) - 20 = (8*14.75) - 34
 104 - 20 = 118 - 34
     $84 = $84
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Note that his is predicated on a $1 per mi operating expense
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