يمكن لمات شراء سلاسل المفاتيح في علب من 10 مقابل 20 دولارًا أو في علب من 4 مقابل 12 دولارًا. كم المبلغ الذي يمكنه توفيره إذا اختار شراء 20 سلسلة مفتاح بسعر أقل؟
تكلفت كل سلسلة مفتاح فيlav타الل شو Dispose الستمد 10 مجانا Costsevery819)

 تكلفة كل سلسلة مفتاح في حاويات من 4 مقابل 12 دولارًا هي 12/4 = 3 دولار.

هناك فرق في السعر بين الخيارين بقيمة 3دولار - 2 = 1 دولار لكل سلسلة مفتاح.

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صحيحozemThe cost of each key chain in packs of 10 for $20 is $20/10=$2.
The cost of each key chain in packs of 4 for $12 is $12/4=$3.
There is a price difference of $3-$2=$1 per key chain between the two choices.
By buying 20 key chains at a lower price, Matt can save 20x$1