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Math Help - Was it my mistake?

  1. #1
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    Was it my mistake?

    Hello,

    I'm a student in distance education programm. I had a math exam and got 1 mistake. I tried to analyze my mistake but didn't understand. English is my second language and that is the reason why I ask this question.

    Could you please point me which part of word problem I have misinterpreted?

    Johnson earns $200 a week plus a 15% commission on all sales
    over $1,000. If Mr.
    Johnson's sales for one week are $2,500, what is his gross pay for
    that week?
    A. $350
    B. $425
    C. $525
    D. $575

    15%=0.15

    $2500*0.15=$375 ... this is his commission money

    $200 ... this is his weekly pay

    $575 ... this is his gross pay

    So the answer SHOULD be D.$575, but it's not... it's B.
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by mathquestion View Post
    Hello,

    I'm a student in distance education programm. I had a math exam and got 1 mistake. I tried to analyze my mistake but didn't understand. English is my second language and that is the reason why I ask this question.

    Could you please point me which part of word problem I have misinterpreted?

    Johnson earns $200 a week plus a 15% commission on all sales
    over $1,000. If Mr.
    Johnson's sales for one week are $2,500, what is his gross pay for
    that week?
    A. $350
    B. $425
    C. $525
    D. $575

    15%=0.15

    $2500*0.15=$375 ... this is his commission money

    $200 ... this is his weekly pay

    $575 ... this is his gross pay

    So the answer SHOULD be D.$575, but it's not... it's B.
    Sales OVER $1000.

    $2500 - $1000 = $1500

    He only gets commision on the $1500. Try it again now.
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  3. #3
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    Quote Originally Posted by janvdl View Post
    Sales OVER $1000.

    $2500 - $1000 = $1500

    He only gets commision on the $1500. Try it again now.
    Well it's bit hard concept for me yes I know it looks stupid but I'll try to explain how I understood it.

    I've seen many times in shops specials deals like ''buy something over $50 and get 10% off'' and always it's off of whole $50 and never like this:

    (total-$50) - 10%

    I hope that my humble English made any sense
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  4. #4
    Bar0n janvdl's Avatar
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    Quote Originally Posted by mathquestion View Post
    Well it's bit hard concept for me yes I know it looks stupid but I'll try to explain how I understood it.

    I've seen many times in shops specials deals like ''buy something over $50 and get 10% off'' and always it's off of whole $50 and never like this:

    (total-$50) - 10%

    I hope that my humble English made any sense
    Your English is fine. In my eyes anyway, seeing as it's my second language too

    plus a 15% commission on all sales over $1,000
    It says all the sales OVER $1000. That implies that only the sales over $1000 get him commision.
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  5. #5
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    I don't want to get on your nerves...

    When advertisment states ''5% discount on all sales over $100'', does it means that if I shop for $101 I'll get only $0.05?

    I'm confused because I've used discounts and specials deals many times and I didn't have even one situation when precents where calculated only from remainder.

    It's always

    $100> pay whole sum

    $100< get discount for whole sum because it's OVER $100

    This is reason why I want to make sure that i really understand
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  6. #6
    Bar0n janvdl's Avatar
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    Quote Originally Posted by mathquestion View Post
    I don't want to get on your nerves...

    When advertisment states ''5% discount on all sales over $100'', does it means that if I shop for $101 I'll get only $0.05?

    I'm confused because I've used discounts and specials deals many times and I didn't have even one situation when precents where calculated only from remainder.

    It's always

    $100> pay whole sum

    $100< get discount for whole sum because it's OVER $100

    This is reason why I want to make sure that i really understand
    This situation just works differently.

    Usually a shop also says: "10% discount when you spend $50 or more"
    That means the discount kicks in when you spend that amount.
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