This is my current plan... I need to reach 1500 cal, and this plan only gets me about 1200, so I need around 200 more (I give myself a buffer in case my counts aren't accurate.

Breakfast-
2 scrambled eggs (200 cal)
Yoplait Smoothie with Almond Milk (180 cal)

Snack-
100 calorie pack or granola bar (100 cal)

Lunch-
Chicken Noodle Soup (150 cal)
Banana (100 cal)

Snack-
100 calorie pack or granola bar (100 cal)

Dinner-
Chicken Breast w/ Shake & Bake (250 cal)
Veggie (around 50 cal)

Total= 1130

How can I squeeze in some high quality (does that make sense?) calories?

Oh, and I have a pretty tight budget, and don't always have the resources to cook due to work/busy schedule.

putting some peanut butter on your banana can easily get you some of those extra calories while being nutritious. I actually want to start doing that with my banana snack because I am not getting enough either

A good healthy snack would be a measured portions of nuts. Almonds, cashews, etc. 1/4 cup is around 200 calories.

You could replace one of your granola bars with an apple and some peanut butter. That will run you around 270 calories if you use one serving of PB. I like granny smith apples for this, the tartness really works well with the salty PB.

I'll also second a handful of nuts. Or you could sprinkle some low fat cheese on your eggs. Or add a piece of whole grain bread with your breakfast or lunch, I'm not seeing a lot of grains in your meals.

You don't look like you have a lot of healthy fats going on. Nuts, as everyone said, would be a good option, or cook your veggies and eggs in a teaspoon of olive oil.

You could use some fresh fruit and some more calcium goodies. So maybe some Greek yogurt and some fruit after dinner?

I agree with the healthy fats - olive oil to cook or finishing oils, avocado, dairy, nuts and nut butters, hummus, beans, etc.