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I have some products (packets) that contain (Sheets) for example:

Product A (Unit: Packet, Packet = 5 Sheet), when I sell one packet and 2 sheet of this product, then:

Total = Packet Price + (Number of Sheet * Packet Price / 5)

But this item has discount for 30% for one Packet, I don't know how to calculate it for Sheets.

Akam
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  • Do you want to calculate the discount on a sheet given you have a 30% discount on a packet? I guess not, but I cant figure out what your question is. – JKnecht Apr 06 '16 at 20:42
  • @JKnecht: Yes exactly... "Do you want to calculate the discount on a sheet given you have a 30% discount on a packet?" – Akam Apr 07 '16 at 01:11
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    So you want to know this?

    Lets say you usually charge $$y$ for a packet which consists of $5$ sheets.

    With a $30%$ discount you charge $$0.7 \cdot $y$$.

    $5 + n$ sheets is priced as $$\text{Packet Price} + (\text{Number of Sheets n} \cdot \text{Packet Price} / 5)$$

    So, usually you charge $$$y + n \cdot $y / 5$$

    Now with the discount you charge $$0.7 \cdot $y + n \cdot 0.7 \cdot $y / 5$$

    And you want to know what discount this means per sheet?

     – JKnecht Apr 07 '16 at 18:56

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