I keep running into situations in Excel where I want to calculate a conditional sum, but my criterion is something along the lines of "Include cell B1 if cell A1 is a number, likewise B2 and A2, B3 ...

Q. Our company provides financial reporting audits and IT audits. The client invoices provide an itemized list of time spent on each type of audit, by auditor and date. Is there an easy way to provide ...