Amy bought a box of chocolates originally priced at $14. She received a 15% discount on the original price, and then she paid a 4% sales tax on the purchase price. What is the total amount that Amy paid for the box of chocolates?

To find the total amount Amy paid for the box of chocolates, we first need to calculate the price after the discount and then apply the sales tax to that discounted price.

1. Calculate the discount amount: \[ \text{Discount} = \text{Original Price} \times \text{Discount Rate} \] \[ \text{Discount} = 14 \times 0.15 = 2.10 \]

2. Calculate the discounted price: \[ \text{Discounted Price} = \text{Original Price} - \text{Discount} \] \[ \text{Discounted Price} = 14 - 2.10 = 11.90 \]

3. Calculate the sales tax: \[ \text{Sales Tax} = \text{Discounted Price} \times \text{Sales Tax Rate} \] \[ \text{Sales Tax} = 11.90 \times 0.04 = 0.476 \]

4. Calculate the total amount paid: \[ \text{Total Amount Paid} = \text{Discounted Price} + \text{Sales Tax} \] \[ \text{Total Amount Paid} = 11.90 + 0.476 = 12.376 \approx 12.38 \]

Therefore, the total amount that Amy paid for the box of chocolates is $12.38.

The correct answer is C. $12.38.