Nice shortcut (I’ll probably forget it). 

That’s a font property that can be used in any Windows application that allows you to set the font properties. It might be what you want to use.

As someone mentioned, you could use a special fill color (shade the cells). If you have your data set up as a table (which I recommend for nearly all data that is set up on a line by line format), you can filter by color and hide the lines that are shaded (contract filled) and show only unsold/contracts unfilled grain if you wish