First, let's calculate the total cost of the CDs and the sales tax.
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Cost of 3 CDs: \[ \text{Cost of CDs} = 3 \times 13.99 = 41.97 \]
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Calculate the sales tax: \[ \text{Sales tax} = 4% \text{ of } 41.97 = 0.04 \times 41.97 = 1.6788 \] We can round this to $1.68 for simplicity.
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Total cost: \[ \text{Total cost} = \text{Cost of CDs} + \text{Sales tax} = 41.97 + 1.68 = 43.65 \]
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Calculate change: \[ \text{Change} = \text{Amount given} - \text{Total cost} = 60.00 - 43.65 = 16.35 \]
Therefore, your change is $16.35.