And yea, now that I think of it, the meaning of the restaurant is probably: "High quality food, for cheap price"
"Yasu" meaning cheap (as Andrew said), and "Taka" meaning "Expensive" or "High" or in this case, probably just "High quality".
This restaurant always had a huge line-up to get in, and they were known for "high quality" karage chicken and ramen, but it still had the "mom and pop" feel, hence much cheaper prices than you'd pay at a high-class restaurant.