start adding styles for IEe and lower
add "grunt/cssSource/_baseIE8Desktop.scss" to the project

create a .scss file that will contain styles to be shared among "grunt/cssSource/_oldIE.scss" and "grunt/cssSource/_desktopStyles.scss." add it to styles.min.css Sass build by adding it to "styles.scss."
start testing 'grunt/cssSource/_baseIE8Desktop.scss'

seeing if this file can be shared among 2 different .scss file but this may change.  See the GitHub link that's part of this specfic commeit to learn more, specifically Chris Epstein's comments.
add comments to "grunt/cssSource/_oldIE.scss"
push both production and development copies of styles.css to GitHub