While I use Excel at work, I tend to use Numbers (part of the Apple Productivity Apps suite) at home. I have sheets that do a number of different things, most of them rife with macros and automatic functions. From time to time, I need to ensure that the result of a function either overstates or understates a result. This cannot be achieved when using the SUM function, so a different function must be used. Luckily, Numbers provides you three functions to achieve just this (as, I would assume, does Excel). They are called ROUND, ROUNDDOWN and ROUNDUP. Their syntax are the same: