To calculate the total amount Janice paid for the skirt including sales tax, we start with the cost of the skirt and calculate the sales tax.
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Calculate the sales tax: \[ \text{Sales Tax} = \text{Cost of the Skirt} \times \text{Sales Tax Rate} \] \[ \text{Sales Tax} = 45 \times 0.07 = 3.15 \]
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Add the sales tax to the cost of the skirt to find the total amount paid: \[ \text{Total Amount Paid} = \text{Cost of the Skirt} + \text{Sales Tax} \] \[ \text{Total Amount Paid} = 45 + 3.15 = 48.15 \]
Therefore, the total amount Janice paid for the skirt, including sales tax, is $48.15.