Answer:
$24 million
Step-by-step explanation:
During year 2, the percentage of completion = $20 million / $50 million = 40%.
Since the building advanced 40% during that year, then the company must recognize 40% of total contract price as revenue for this year = 40% x $60 million = $24 million.
The percentage of completion method is not cumulative, it is calculated on a year to year basis.