Quality cheap protein:
Tubs of greek yogurt, pre cooked rotisserie chickens, ground beef, cottage cheese, eggs, sausage...
Quality cheap carbs:
Rice, rice cakes, potatoes, sweet potatoes, squash...
Quality cheap fats:
You shouldn't need to supplement your diet with just plain oils (adding to foods for no reason, drinking it lol) unless your in a hurry and need to make a well rounded protein shake.
Examples of whole foods that cover fats are ground beef, eggs, sausage, peanut butter and avocados. So if you eat a lot of these things your fat will be covered.
Cook with real butter and add some olive oil (for dressing) to your salads or vegetables. Every bit adds up.