In order to solve for total sales, you first must solve for the amount of sales tax. Since she bought 3 yards of cloth, she bought \(2.25*3=$6.75\) worth of cloth. Now to find the sales tax, multiply that value by \(0.05\), which looks like \(6.75*0.05=0.34\) (I'm rounding to the nearest cent). So to solve for the total cost, add those two values together. So the answer is \(6.75+0.34=$7.09\), which is answer choice D.
