The balance in Accounts Receivable at the beginning of the year was $$520,000.$ The balance in Accounts Receivable at the end of the year was $$780,000.$ Customer accounts of $$420,000$ were written off. The company collected $$4,060,000$ from credit customers and $$1,010,000$ from cash customers. What are credit sales for the year?

A$.$ $$4,220,000$

B$.$ $$4,060,000$

C$.$ $$4,480,000$

D$.$ $$4,740,000$