As owner and senior accountant at a tax preparation firm, mark is changing the work schedule of all employees, including managers and accountants, for the months of march and april, the company's busiest time. he is requiring everyone to work on weekends, just as he has during the tax-preparation season for the last ten years. mark should expect that his employees will be

Mark knows that his employees will probably complain a little, but not much. They will follow his example as a leader that also works with them during the weekends. They have been doing it for ten years, so it's no surprise to any of them.

It would be a completely different scenario if Mark didn't work with them during the weekends, then they would be very upset.  

sumif(range,criteria,sum_range)

the range is range of cells you want to be included.

criteria in the form of a number, expression, or text that defines which cells will be added. for example, criteria can be expressed as 32, "32", "> 32", "apples".

sum_range is the actual cells to add if their corresponding cells in range match the criteria