Answer:
The gross profit under percentage-of-completion method is $180000 for the year ended 31st December 2017 as shown in the attached.
Explanation:
The formula for calculating gross profit under percentage-of-completion method is given as
Gross profit =costs incurred to date/total contract costs*contract total gross profit
Costs incurred to date =$800000
Total costs =$2000000
Hence gross profit % is =800000/2000000
=40%
As a result 40% of the total gross profit of $450000 is due to be recognized now.
Find the attached for detailed computations.