Question

Тетрадь стоит 3 рубля 20 копеек. Если покупатель получает более 100 тетрадей, то магазин делает скидку 10% от стоимости всей покупки. Представитель школы купил 200 тетрадей. Сколько рублей он заплатит за покупку?

Answer 1

3.20*200=640  640-20%=121,6

Answer 2

320 за 100 тетрадей -10%=288
576 за 200 

Answer 3

Calculation of the Total Cost

To calculate the total cost of the purchase, we need to consider the following information:

- The price of each notebook is 3 rubles and 20 kopeks. - If the buyer purchases more than 100 notebooks, the store offers a 10% discount on the total purchase.

Let's break down the calculation step by step:

1. Determine the number of notebooks purchased by the school representative: 200 notebooks.

2. Calculate the total cost before the discount: - Price per notebook: 3 rubles and 20 kopeks. - Total cost before the discount: 200 notebooks * (3 rubles + 20 kopeks).

To calculate the total cost, we need to convert the kopeks to rubles. Since 100 kopeks make 1 ruble, we divide the kopeks by 100 and add the result to the rubles.

Let's perform the calculation:

Total cost before the discount = 200 notebooks * (3 rubles + 20 kopeks) = 200 notebooks * (3 rubles + 20 kopeks/100) = 200 notebooks * (3 rubles + 0.2 rubles) = 200 notebooks * 3.2 rubles.

Therefore, the total cost before the discount is 640 rubles.

3. Calculate the discount: - If the total number of notebooks purchased is more than 100, the store offers a 10% discount on the total purchase. - In this case, the school representative purchased 200 notebooks, which is more than 100 notebooks.

To calculate the discount, we multiply the total cost before the discount by 10% (0.1).

Discount = 0.1 * Total cost before the discount = 0.1 * 640 rubles.

Therefore, the discount is 64 rubles.

4. Calculate the final cost after the discount: - Subtract the discount from the total cost before the discount.

Final cost after the discount = Total cost before the discount - Discount = 640 rubles - 64 rubles.

Therefore, the final cost after the discount is 576 rubles.

So, the school representative will pay 576 rubles for the purchase of 200 notebooks.