SALE on Variant Items is not showing on Store Front Page

SALE on Variant Items is not showing. I have 4 t-shirt sizes and I want them all to show they are on sale on the store page by displaying red $19.99 with line through it like the other items in the row. It just isn't doing this for me and I believe I have everything setup correctly. --->

If I go through the whole process of selecting a size I do see this red sales price in the lightbox.