Can you explain how you came to your answers. Just the answer does me no good. Thank you so much!

On February 1, 2018, Arrow Construction Company entered into a three-year construction contract to build a bridge for a price of $8,400,000. During 2018, costs of $2,160,000 were incurred, with estimated costs of $4,160,000 yet to be incurred. Billings of $2,692,000 were sent, and cash collected was $2,410,000. In 2019, costs incurred were $2,692,000 with remaining costs estimated to be $3,840,000. 2019 billings were $2,942,000, and $2,635,000 cash was collected. The project was completed in 2020 after additional costs of $3,960,000 were incurred. The company's fiscal year-end is December 31. This project does not qualify for revenue recognition over time. Required: 1. Calculate the amount of revenue and gross profit or loss to be recognized in each of the three years. 2a. Prepare journal entries for 2018 to record the transactions described (credit "various accounts" for construction costs incurred). 2b. Prepare journal entries for 2019 to record the transactions described (credit "various accounts" for construction costs incurred). 3a. Prepare a partial balance sheet to show the presentation of the project as of December 31, 2018. 3b. Prepare a partial balance sheet to show the presentation of the project as of December 31, 2019. Complete this question by entering your answers in the tabs below. Reg 1 Req 2A Req 2B Req Req 3B Calculate the amount of revenue and gross profit or loss to be recognized in each of the three years. (Loss amounts should be indicated with a minus sign.) Year Revenue recognized Gross profit (loss) recognized 2018 2019 2020 8,400,000 Total $ 8,400,000 S 0