Final answer:
The total cost of Sarah's fabric purchase, including sales tax, is $18.51.
Step-by-step explanation:
To find the total cost of Sarah's purchase, we need to calculate the cost of the fabric and the sales tax. First, we calculate the cost of the fabric by multiplying the length (4.6 yards) by the price per yard ($3.75).
Total cost of fabric = 4.6 yards * $3.75/yard = $17.25
Next, we calculate the sales tax by multiplying the total cost of the fabric by the sales tax rate (7.325%).
Sales tax = $17.25 * 7.325% = $1.26 (rounded to two decimal places)
Finally, we find the total cost of Sarah's purchase by adding the cost of the fabric and the sales tax.
Total cost of purchase = $17.25 + $1.26 = $18.51