Hi @Juice , thanks for the screenshots! I'm happy to help.
Since your variable $[Patient Copay] is an entire row or rowlink, you'll need to also specify the column in the table that has the desired value.
Meaning in the formula, this piece would look like: ($[Patient Copay][Name of column with desired value])
Let us know if that helps. If you're still getting an error, we recommend splitting up the formula to ensure that all other variables are available on the screen.