You are an audit manager, and a senior auditor has sent you an Excel file that contains a VLOOKUP formula. You noticed that the sum of the invoice payments for a specific client is different than the one provided by the client. You asked the senior auditor what could be wrong and whether the VLOOKUP function is case-sensitive. They answered that the VLOOKUP function is case-sensitive and that the discrepancy could be due to the fact that the client's name is written using only uppercase letters. Your coworker is correct in saying that the VLOOKUP function is case-sensitive