
Answer and Explanation:
a. The computation of the e amount of revenue, expense, and net income for each of the three years 2017 through 2019 is shown below:
Year         2017           2018            2019
Expense     $36 million     $81 million        $63 million   (A)
Total
cost incurred  $180 million    $180 million       $180 million  (B)
Completion
Percentage   20%          45%             35%  C =  (A ÷ B)
Revenue
Recognized   $44           $99             $77   D = ($220 million × C)
Gross profit   $8            $18             $14  (D - A)
b. As per the above calculation, the cost-to-cost method provides a good measure as it creates a relationship between the cost incurred and recognized the revenue