Have a long list of identifiers:

E6A3289A
F9DB1200G5W
KRQ7356VQ
G1200GUWY87

In a helper column, we need to identify (true or false is ok) if the
value in the first column contains the string 1200.
It may appear anywhere in the cell value; it is not consistently found
after or before a given number of other characters within that cell.

Extra points if it can be done within the result fields in a pivot
table. (IOW, filter for the 1200 on the drag and drop page.)
Ideas?

Pierre