Answer:
Net income for 2018 is $8,500
Net income for 2019 is $15,500
Net income for 2020 is $17,500
Retained earnings from 2018 to 2020 is $41,500
Step-by-step explanation:
Net income = cash revenue - cash expense
Net income for 2018 = $19,000 - $10,500 = $8,500
Net income for 2019 = $29,000 - $13,500 = $15,500
Net income for 2020 = $39,000 - $21,500 = $17,500
Retained earnings from 2018 to 2020 = net income for 2018 + net income for 2019 + net income for 2020 = $8,500 + $15,500 + $17,500 = $41,500