To determine if Maya is saving money with the salesperson's offer, we need to calculate the cost of the rocks at the standard price and compare it to the offered price.
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Calculate the total cost at the standard price:
- Cost per ton of rocks: $32.90
- Amount of rocks needed: 10.4 tons
\[ \text{Total cost} = \text{Cost per ton} \times \text{Amount of tons} = 32.90 \times 10.4 \]
\[ \text{Total cost} = 341.16 \]
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Compare with the salesperson's offer:
- Offer price: $330
Now we can see if Maya is saving money:
\[ \text{Savings} = \text{Total standard cost} - \text{Offered price} = 341.16 - 330 \] \[ \text{Savings} = 11.16 \]
Thus, Maya is saving money if she agrees to the deal, and she will save $11.16 by accepting the salesperson's offer.
In summary, Maya should actually be charged $341.16 for the rocks at the standard price, but she can buy them for $330 from the salesperson.