1. A computer program product for processing spreadsheet data, the computer program product being embodied in one or more non-transitory computer readable storage media and comprising computer instructions for: prior to executing an operation, determining if a resulting quantitative unit of a result of the operation with respect to one or more values is not supported when the resulting quantitative unit is not within a defined range of supported spreadsheet units associated with a format of the one or more values or is ambiguous when mixed quantitative units are specified for the one or more values, wherein each of at least a subset of the one or more values is specified with quantitative units; when the resulting quantitative unit is not supported, stripping the quantitative units of the at least subset of the one or more values prior to executing the operation; executing the operation to yield a numeric result; and displaying the numeric result without quantitative units when the resulting unit is not supported, is ambiguous, or both.