Buy meat, veggies, fruits.
The type and cut of meat that you buy depends on preference, cooking method, and budget. My family buys a lot of whole chickens and chicken thighs because they're cheap and have good fat content. If you're going to buy normal bacon, you probably want to take it easy on the consumption.
Meat is the most expensive part of eating Primally - we eat a lot of ground beef and cheaper chicken, with occasional pricier cuts to fend off boredom. Also, lots of eggs!
In your face, Space Coyote!