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stirlingpowers

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Posts posted by stirlingpowers

  1. Take it that's what you meant there.

    I think you're pretty much doing what I'm doing but more proper :P. My answer is for kids who don't read good and want to do other stuff good too...

    Jup, the little pedantic teacher in me is really triggered by math forum questions. Anyway, that 0.15 instead of 0.14 typo is crucial for understanding, good you found that one.

  2. I'll restate what I think might be the solution in more common terms:

    You always apply this equation to calculate your selling prices:

    discount factor x base price = selling price

    Now you know that at 300 units, where you have defined a discount factor of 0.2, you have a selling price of £70.

    Then you can calculate your base price with the above equation:

    0.2 x base price = £70

    If you divide by 0.2 on both sides of the equal sign, you get:

    base price = £70 / 0.2

    This is where the £350 base price comes from.

    With this base price and your discount factors, you can get a selling price at any amount of units:

    discount factor x £350 = selling price

    That is the straightforward way for me.

    Pasting this into your original problem statement gives you:

    1 unit: £140

    10-24 units: x 0.45 of £140

    25-49 units: x 0.28 of £140

    50-99 units: x 0.23 of £140

    100-299 units: x 0.21 of £140

    300 units: x 0.20 of £140

    What I need to do is this:

    1 unit: £70 / 0.2 x 1 = £350

    10-24 units: £70 / 0.2 x 0.45 = £157.5

    25-49 units: £70 / 0.2 x 0.28 = £98

    50-99 units: £70 / 0.2 x 0.23 = £80.5

    100-299 units: £70 / 0.2 x 0.21 = £73.5

    300 units: £70

    In your second answer, you said:

    1 unit: x 1.00 of ???

    10-24 units: x 0.60 of ???

    25-49 units: x 0.40 of ???

    50-99 units: x 0.30 of ???

    100-299 units: x 0.25 of ???

    300 units: £70

    If you don't have the discount factor at 300 units, you will have to extrapolate that curve to 300 units.

    I can post a simple technique of extrapolation, based on just the numbers given above, or based on fixed and running costs if necessary.

    But I don't assume that this is the problem you want to have solved here. I think it is more like this:

    If you choose a discount factor of 0.14 for 300 units, my solution pasted in your statement would be:

    1 unit: x 1.00 of £70/0.14 = £500

    10-24 units: x 0.60 of £70/0.14 = £300

    25-49 units: x 0.40 of £70/0.14 = £200

    50-99 units: x 0.30 of £70/0.14 = £150

    100-299 units: x 0.25 of £70/0.14 = £125

    300 units: x 0.14 of £70/0.14 = £70

    But I am not quite sure about this being the solution, since I did neither consider how the discount factors came to be nor the

    total amount of cost at a certain amount of units.

    • Like 1
  3. Your discount factors define a relative discount function.

    Relative means it needs to be multiplied with an absolute base price for a certain quantity to get the real selling price.

    For brevity, let's call the discount function d. It gives back a value d[q] for a certain quantity q. The base price shall be called b, the real selling price r:

    d[q] * b = r

    At quantity 1, d has the value 1: d[1] = 1

    At quantity 300, d has the value d[300] = 0.2

    You know the following equation is true:

    d[300] * b = £70

    When you divide this equation by d[300]:
    b = £70 / d[300] = £70 / 0.2 = £350

    The rest of the prices is found by just multiplying the basePrice with the discount function at the desired quantity:

    d[q]*£350 = r

    • Like 1
  4. One can buy these hydroformed tubings from many Taiwanese and Chinese factories, even for smaller production runs (few hundred) at a reasonable price.

    It's a matter of getting the right model. Most are fairly thin, but if the cross-section at the ends is designed properly,

    they will endure trials use (see Koxx Kloud). The Skye proto above looks promising in that area, not perfect, but very reasonable.

    Probably they have even used a thicker downhill tube here.

    Far more interesting: Is this a picture of the first tapered fork for Street Trials?

  5. Preloading the spring in the initial phase of the jump to use its stored energy in the late phase is borderline cheating, at least for the biketrials idea. What's next? Pressurizing an air volume with several little jumps before a big jump to power some catapult?

    Comp aside, I like it though.

  6. The display systems people use could have something to do with it.

    I see it as brown and blue.

    I tested the image with a color analysis tool on my desktop, and it

    showed that it is clearly very much blue and brown everywhere.

    In some regions, it leans toward white and dark neutral grey by color

    balance, but it is displayed as blue and brown for the most part on

    my computer.

  7. Hm.... I think (at least with a racing line body) you have to somehow hold the piston in place when swapping the lever blade or am I mistaken? Doesn't it pop out when taking off the lever and the TPA with it or is it that the "vacuum" keeps it where it is?

    Nopop

  8. Nice "classic" trials riding. My favourite flavour.

    I like that you uploaded it to vimeo as well, I could watch it without problems - many Youtube trials videos are censored in Germany.

    • Like 1
  9. UP website:

    When you synch with the UP mobile app, we collect the following information your band collects about you whenever you wear it: Detailed physical information based on monitoring your micromovements, including when you are asleep, when you are awake, when you are idle, and your activity intensity and duration. This data is translated into information such as your sleep patterns, calories you burn, and your trends and progress. This information can also reveal certain health conditions you may have.

    and the fun part:

    We may share your personal information for the purposes of a business deal (...).

    Typically, these deals are with "HR" or insurance analytics companies.

    So apply to a job, get rejected automatically because of how and when you sleep.

    Not something I just made up: http://www.hrexaminer.com/reengineering-hr-five-threads-of-technology/

    There are a lot of greedy idiots out there, who will do anything for money or more control over other people.

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