Modify Grid formatting in Workflow

I have a software request workflow were I am using a grid to display (Software Name, Cost, Selectable) and right now I have the grid being populated from SQL and the 'Cost' is coming in as a number and I would like to add a $ to the start of all of the fields under 'Cost'.  Is there a way that I am missing to format a grid or am I better off figuring it out in SQL?