Pell Company acquires $80\%$ of Demers Company for $$500,000$ on January $1,2021.$ Demers reported common stock of $$300,000$ and retained earnings of $$210,000$ on that date. Equipment was undervalued by $$30,000$ and buildings were undervalued by $$40,000,$ each having a $10-$year remaining life. Any excess consideration transferred over fair value was attributed to goodwill with an indefinite life. Based on an annual review, goodwill has not been impaired.

Demers earns income and pays dividends as follows:

$20212022,2023$

Net income $$100,000$$$120,000$$$140,000$

Dividends $40,000,50,000,60,000$

Assume the equity method is applied.

What is the consolidated balance of the Investment in Demers account at December $31,2023.$

a$.$ $$0$

b$.$ $$643,200$

c$.$ $$639,000$

d$.$ $$763,200$

e$.$ $$620,000$