Hi Susan,
Use the FIND function. Search for one piece of text ("SA EX") within some other text ({Item #}), starting at a particular place (1 for the beginning of the item #, a different number if you don't want to search at the beginning of the item #).
The result will be 0 if not found, or an integer if found, representing the character position where it was found. Do a filter that looks for the result of this formula not equal to zero.
Information for using the FIND function can be found in the Help file.
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Regards,
Softrak Tech Support