Crystal reports - Find where variable value is set

I am working on a Crystal report written by someone else. It has formulas that contain shared variables. The problem is I cannot find where the values are loaded. I suspected since they are shared variables, there is a subreport, but I cannot find it. There is one subreport, but the only thing it does is supply a heading. I am attaching a report definition. One of the formulas is j1. It contains shared numbervar F001_TC_3; That is all it contains.  sales-tax-calculation---jan-2011.txt This is Crystal XI.