Please answer the below question!

• On the consolidated statement of income, what are the main sources of revenue for the fiscal year?
• Are there any unusual aspects of revenue recognition because of the industry in which the company is involved

CONSOLIDATED INCOME STATEMENTS (In millions, except per share amounts) Years Ended December 31. 2019 2020 2018 $ $ $ 108,673 13,812 122,485 122,697 14,540 137,237 133,045 14,004 147,049 Net sales and revenue Automotive GM Financial Total net sales and revenue (Note 3) Costs and expenses Automotive and other cost of sales GM Financial interest, operating and other expenses Automotive and other selling, general and administrative expense Total costs and expenses Operating income Automotive interest expense Interest income and other non-operating income, net (Note 19) Equity income (Note 8) Income before income taxes Income tax expense (Note 17) Income from continuing operations Loss from discontinued operations, net of tax (Note 22) Net income Net loss attributable to noncontrolling interests Net income attributable to stockholders Net income attributable to common stockholders Earnings per share (Note 21) Basic earnings per common share - continuing operations Basic loss per common share - discontinued operations Basic earnings per common share Weighted average common shares outstanding - basic Diluted earnings per common share - continuing operations Diluted loss per common share - discontinued operations Diluted earnings per common share Weighted average common shares outstanding - diluted 97,539 11,274 7,038 115,851 6,634 1,098 1,885 674 8,095 1,774 6,321 110,651 12.614 8,491 131,756 5,481 782 1,469 1,268 7,436 769 6,667 120.656 12,298 9,650 142,604 4,445 655 2,596 2,163 8,549 474 8,075 70 8,005 9 8,014 6,321 106 6,427 6,667 65 $ $ 6,732 $ $ 6,247 $ 6,581 $ 7,916 $ 4.36 4.62 A A A $ $ $ $ $ $ 4.36 1,433 4.62 1,424 5.66 0.05 5.61 1,411 5.58 0.05 5.53 1,431 4.33 4.57 A A A $ $ $ $ $ 4.33 1,442 4.57 1,439 CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (In millions) Years Ended December 31, 2020 2019 6,321 $ 6,667 $ 2018 8,005 Net income Other comprehensive income, net of tax (Note 20) Foreign currency translation adjustments and other Defined benefit plans Other comprehensive loss, net of tax Comprehensive income Comprehensive loss attributable to noncontrolling interests Comprehensive income attributable to stockholders (523) (1,795) (2,318) 4,003 92 4,095 (6) (2,122) (2,128) 4,539 76 4,615 (715) (221) (936) 7,069 15 7,084 $ $ $