You want to carpet a 15 foot by 20 foot room. You have two carpet options to choose from. One is $1.50 per square foot and the other is $3.00 per square foot. How much more will your total bill be if you choose the more expensive carpet rather than the cheaper one?
a. $52.50 more.
b. $105 more.
c. $450 more.
d. more than $500 more.