To find out how much Maya should actually be charged for the rocks, we can calculate the total cost based on the price per ton.
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Calculate the total cost for 10.4 tons of rocks:
\[ \text{Total cost} = \text{Cost per ton} \times \text{Number of tons} \] \[ \text{Total cost} = 32.90 , \text{dollars/ton} \times 10.4 , \text{tons} \] \[ \text{Total cost} = 341.16 , \text{dollars} \]
Maya should actually be charged $341.16 for the rocks. The salesperson's offer of $330 is less than what Maya should be charged.