Answer
The total cost of the dictionary, including sales tax, is $18.43.
Work Step by Step
discount=rate*original
$d=(0.06)(18.50)=1.11$
sale price=original-discount
$s=18.50-1.11=17.39$
sales tax=rate*price
$t=(0.06)(17.39)=1.04$
total cost=price+tax
$tc=17.39+1.04=18.43$
