On June 1, 2020, Roman Construction Company Inc. contracted to build an office building for Sicily Corp. for a total contract price of $2,600,000. On July 1, Roman estimated that it would take between 2 and 3 years to complete the building. On December 31, 2022, the building was deemed substantially completed. Following are accumulated contract costs incurred, estimated costs to complete the contract, and accumulated billings to Sicily 2020, 2021, and 2022:
	At	At	At
	12/31/2020	12/31/2021	12/31/2022
Contract costs incurred during the year	$ 600,000	$ 1,500,000	$ 2,750,000
Estimated costs to complete the contract	1,800,000	1,200,000	-
Billings to Sicily	400,000	1,200,000	2,400,000

(b) Using the completed-contract method, prepare schedules to compute the profit or loss to be recognized as a result of

this contract for the years ended December 31, 2020, 2021, and 2022. (Ignore income taxes.)

Please help me to explain in detail how you get the number for this question! I know the answer are $0 for 2020 and 2021. And ($150,000) for 2022. But I don't know how to calculate to have these answer. Thanks so much!