Answer
Over six years, the total expense for a Cadillac is $\$104,400$ more than the total expense of a Toyota Corolla.
Work Step by Step
We can find the total annual expense for a Cadillac.
$expense = (\$0.98~/mi)(30,000~mi) = \$29,400$
We can find the expense for a Cadillac over six years.
$expense = (\$29,400/yr)(6~yr) = \$176,400$
We can find the total annual expense for a Toyota Corolla.
$expense = (\$0.40~/mi)(30,000~mi) = \$12,000$
We can find the expense for a Toyota Corolla over six years.
$expense = (\$12,000~/yr)(6~yr) = \$72,000$
We can find the difference in the expense for the two cars over six years.
$\$176,400 - \$72,000 = \$104,400$
Over six years, the total expense for a Cadillac is $\$104,400$ more than the total expense of a Toyota Corolla.
