You are an experienced staff accountant working on the audit of RB Johnson Electric Company (the Company) as of and for the year ended December 31, 2022. All of the outstanding common stock of the Company is owned by Barry and Sam Johnson, who are brothers. The Company is engaged in commercial electrical construction on the East Coast of the United States. The Company was formed on January 1, 1947, and has been in continuous operation since that date. The Company employs approximately 100 people and has normal revenues between \$25 and \$35 million. The Company's bonding needs and its line of credit agreement, with Truist, require the financial statements to be audited. The Company has a very good Chief Financial Officer, who was at one time a manager with your firm. Your firm has audited the financial statements for the last 10 years. Adam Silvia is the engagement partner and Joey Sykes is the engagement manager. Based on some staffing issues, you have effectively been assigned the role of engagement senior on this client and you are excited to be working with Joey and having a number of increased responsibilities. The audit has been completed and you and Joey are getting ready to transmit the completed file to Adam for his review. The Company uses the accrual method of accounting and recognizes revenue on the percentage completion method of accounting. The Company's recent adoption of ASC 606 did not materially impact the Company's revenue recognition. The Company's trial balance, as of and for the year ended December 31, 2022, follows. By reference to SAS 145, define the term Significant Risk and explain whether or not and why the Company's revenue recognition method (percentage completion) is a significant risk. Problem 10 (Audit Documentation) Subsequent to the release of the Company's financial statements and after the engagement file was locked down, it was determined that the final attorney's letter had been inadvertently left out of the audit documentation. Required By reference to AU-C 230, describe the necessary steps to add this documentation to the audit file