See the promotions of two supermarkets:

| Supermarket A | Supermarket B |
| :---: | :---: |
| 6 cans of 3 liters of QUOTE ice cream | QUOTE ice cream - can of 3 liters |
| $\mathrm{R} \$ 24.00$ | 4 cans - only $\mathrm{R} \$ 14.00$ |

Joana wants to buy 12 cans of ice cream for her birthday party. In which supermarket should she buy and why?

(a) At A, because she will save $R \$ 7.00$ compared to $B$.

(b) At A, because she will save $R \$ 6.00$ compared to $B$.

(c) At B, because she will save $\mathrm{R} \$ 8.00$ compared to $\mathrm{A}$.

(d) At B, because she will save $\mathrm{R} \$ 6.00$ compared to $\mathrm{A}$.

(e) It doesn't matter, because the price is the same in both supermarkets.
The correct option is (d).

If Joana buys at supermarket A, she will spend $2 \times 24=48$ reais. If she buys at supermarket B, she will spend $3 \times 14=42$ reais. Therefore, at supermarket B, she will save 6 reais compared to A.